For hotels & event venues
Event diagram software for hotels & event venues
Send us your floor plans and we do the drawing for you. We convert your function space and its airwall salons one time, and every combination — Salon A, A+B, the full run — derives from that with correct dimensions and capacities. Your team sets theater, classroom, rounds, or crescent in real feet and inches, attaches the plan to the BEO, and captures a lead from every planner who opens your floor plans.
- Monthly billing — no annual contract
- Unlimited team members, never per-seat
- Concierge floor-plan conversion at onboarding
$149
per property per month — flat, monthly, cancel anytime
One drawing
per ballroom — every airwall combination derives
Unlimited
team members, viewers & commenters
Every viewer
of a gated share link captured as a lead
The airwall model
Six salons is twenty-one rooms. We draw one.
A six-salon ballroom on one airwall run books twenty-one different contiguous combinations. Most hotel event diagramming tools store each combination as its own floor plan — twenty-one files to maintain, and the one nobody updated is the one the client booked. EventDiagram models the room the way the building does: one space with its true dimensions and its airwall sections in order along the split. Every combination derives from that single definition. And the drawing itself isn't your job; it comes with onboarding.
Send what you have
Architectural plans, the sales-kit PDF, even a scan. We convert the full ballroom at its real width, depth, and ceiling height. You never draw it, and you never maintain it.
We add the salons
Salon A, B, C… each at its real size, in order along the airwall run, captured from your plans and verified before anything goes live. The whole setup amounts to a few numbers rather than a folder of variants.
Every combination derives
When you diagram a booking, you pick which salons are in play. The canvas resizes, airwall lines render where the walls stand, and the square footage and capacities come out right for that combination.
Fix a dimension, resize a section, or add a salon and every combination updates instantly, because there is nothing to keep in sync. Toggle a section mid-plan and your placed items stay put. When the 400-person program shrinks to 260 the week before load-in, the set moves from ABC to AB with one chip, and the capacities are already right.
What's inside
A banquet room library in real feet and inches
Rounds with live seat counts
60″ and 72″ rounds at true size, chairs auto-arrayed, seat totals updating as you place them. The tally on screen is the count the captain gets.
Classroom, theater & chevron
Classroom rows, theater blocks, and the chevron angles between them, placed to scale with spacing you can defend in the walkthrough. No more guessing in PowerPoint.
Staging, dance floor & head table
Stage decks, podiums, dance floors, and head tables at physical size, so the gala end of the room reads the way it will actually stand, in 2D and in 3D.
Buffets, bars & stations
Buffet lines, bars, and beverage stations drawn at real footprint, so the guest-flow argument happens on the diagram and not at five o'clock on event day.
A copilot that turns the room
Type “classroom for 90 in Salon B” or “restage for a reception flip” and review a to-scale draft before it touches the diagram. Venue plans include 300 copilot messages a month.
Nobody buys a seat
Venue plans include unlimited team members, never per-seat, plus unlimited free viewers and commenters on every share link. The planner, the client, and the AV vendor all work the same plan.
Every item carries real dimensions and a real height, and the 3D walkthrough renders from the same scene as the 2D plan. The set your client walks in the browser is the set your crew builds from the print.
From inquiry to BEO
The diagram is the only page of the BEO that shows instead of tells
Every property knows the failure mode. The BEO says rounds of ten for 180, but the attached diagram is from the last group in the room, or there is no diagram at all because drawing one meant fighting the tool. The set gets built from memory, the walkthrough finds it, and the crew rebuilds a ballroom at 6am. The fix is not a better meeting. It is making the drawing cheap enough that every function sheet ships with one.
Sell with the real room
Answer the inquiry with a link to your actual ballroom — verified dimensions, standard layouts, capacity chart. The planner sees their event in your space while your competitor is still emailing a PDF.
Detail and get sign-off
Diagram the set to scale — or let the copilot draft it — and send one link. The client comments in place, walks the room in 3D, and clicks Approve; the approval is stamped against the exact version.
Attach it to the BEO
Export the to-scale PDF into the BEO packet. The banquet captain, the setup crew, and the AV lead all build from the same drawing the client approved — including the turn sheet for the flip.
Both sets of a turn — general session in theater at 8:00, banquet at 7:00 — live as diagrams in the same event, and the item tally on each is the count the setup crew works from. When the client asks for “the layout from the Hendersons' gala,” it's filed under the event, not in someone's downloads folder.
Space math
Set styles, and the math under the capacity chart
Every set style is a trade-off between headcount, sightlines, and labor. Theater packs the most people in front of a stage. Classroom roughly halves that headcount to give everyone a writing surface; chevron angles the classroom rows toward the screen at the cost of a wider room. Hollow square, U-shape, and boardroom spend square footage on conversation. Banquet rounds are for meals; crescent rounds are for meals that turn into a program.
The working numbers — before staging, buffets, bars, and the dance floor come out of the room: theater runs 6–8 ft² a person, classroom 14–18, banquet rounds 10–12 for a plated dinner and 12–15 once a dance floor joins the program, and a standing reception plans around 6–8. A 60″ round seats eight in comfort and ten tight; a 72″ seats ten, twelve tight. Set rounds on 10-foot centers and the service lanes take care of themselves.
Remember that a capacity chart assumes an empty room. The published theater number never survives contact with the program: a stage takes the first ten to twelve feet of depth, screens need projection throw or wall space, registration and the coffee break eat the back, and a center aisle subtracts a column of seats the whole length of the room. That gap between the chart and what actually fits is why planners ask for the chart and then immediately ask for a diagram. A to-scale plan of their program in your room answers the question the chart never could.
Crescent rounds are the trade's most expensive courtesy. Seating only the stage-facing two-thirds of each round means nobody dines with their back to the speaker — and it drops a 72″ round from ten covers to six. The 200-guest awards dinner that takes 20 rounds set full takes 34 set crescent: fourteen more tables, fourteen more linens and centerpieces, and the floor to hold them. That is exactly the moment to check whether the next salon needs to open — which, in EventDiagram, is one section chip.
None of these are occupancy figures. Posted capacity, aisle widths, and exit counts belong to your local fire marshal — and that conversation goes faster with a to-scale drawing in hand.
On Venue plans, your published rooms carry capacity charts and standard layouts planners can start from — so the math above is answered once, on the room, instead of every Monday by email.
The lead engine
Your floor plans are marketing. Start collecting on them.
Right now your floor plans circulate as PDFs you'll never hear about again. Published on EventDiagram, they work the other direction. Every planner who finds your rooms in the venue directory and starts a diagram is a lead with a name, and the email gate on share links means every viewer checks in before a plan opens and lands in your workspace as a captured lead.
Price it against your average banquet check. One booking that closes because the client could see the room covers the subscription many times over — and your team stops redrawing the ballroom for every enquiry. Every event space at the property, everyone who works there, and a public floor-plan page for the venue are included on every Venue plan. See how venues get listed — claiming your profile is free.
The $149 math
What venues pay today, side by side
At list price the tools are close — the difference is what the money buys and what it commits you to. Figures below are from Cvent's public Social Tables pricing page, August 2026.
| Cvent Event Diagramming (Social Tables) | EventDiagram | |
|---|---|---|
| Venue-side pricing | Pro $150/mo, Premium $320/mo, Enterprise custom (listed Aug 2026) | Venue Lite $69, Venue $149, Venue Pro $299 per property/mo — published, no quote wall |
| Commitment | “All paid plans have a 12-month commitment” (pricing page, Aug 2026) | Monthly on every plan — cancel anytime |
| Team on a paid plan | 1 user per paid plan below Enterprise | Unlimited team members per property — never per-seat |
| Divisible ballrooms | Per-combination floor plans, maintained separately | The room is drawn once — for you, at onboarding — and every airwall combination derives with correct dimensions and capacities |
| Rooms and team included | Tiered by space count and per-seat licensing | Every event space at the property, and everyone who works there, on one per-property price |
| Ecosystem | The category benchmark — Cvent sourcing, RFP, and registration integrations. If your group business runs on the Cvent network, that's a real win | Independent, with open exports on every plan and MCP/API access for your own tools |
| Getting your rooms in | Professional floor-plan redraw services (paid tiers/add-ons) | Concierge conversion of your sales-kit PDFs included with Venue onboarding, verified against two independent scale references |
Competitor details from Cvent's public pricing page, August 2026. Full comparison: the Social Tables alternative page.
FAQ
Questions from the sales & catering office
- Does this replace our sales & catering system?
- No. EventDiagram doesn't book function space, manage contracts, or generate BEOs — Delphi, Tripleseat, or whatever runs your book stays exactly where it is. This is the diagram layer: the to-scale room set that gets attached to the BEO, walked in the site visit, and approved by the client. If the diagram is the only broken part of your stack, you shouldn't have to replace the stack to fix it.
- Our ballroom divides into salons. Do we maintain a floor plan for every combination?
- No — that's the point of the airwall model. Define the ballroom once with its true dimensions and add its sections in order; every combination derives automatically with the correct size, square footage, and capacities. While diagramming, section chips toggle which salons are in play — the canvas resizes, airwall lines render where the walls actually stand, and placed items stay put if the booking changes mid-plan.
- Who draws our rooms in the first place?
- On Venue plans, floor-plan conversion is concierge at onboarding: send the PDFs from your sales kit and you get back your spaces — real perimeter, airwall sections included — with dimensions verified against two independent scale references before anything is published. You review the result, and you own it.
- What happens to the diagrams we already have in Social Tables or Prismm?
- Export them as PDFs and they import as editable, to-scale layouts with real tables you can move, not a flat background image. After an import, check the scale (click a table; a 60″ round should read 5′) and swap the occasional misread item from the palette. Counts recompute instantly. If you're leaving Prismm, export everything before it goes view-only on October 1, 2026 — our export checklist walks the whole account.
- We have more than one property. How does that work?
- Venue plans are per property — $149/property/month covers every event space at that property with unlimited team members; Venue Lite is $69 for a single-event-space venue, and Venue Pro adds API, webhooks and governance. Groups and management companies get Venue Group/Enterprise: multi-property hierarchy, SSO/SCIM, audit logs, API, and managed migration, typically from ~$9K/year, scoped in one call.
- Do planners, clients, and vendors need paid seats?
- Never. Viewers and commenters are unlimited and free on every plan, and Venue plans include unlimited team members — never per-seat. The planner diagramming your ballroom, the client approving the set, and the AV company adding staging all work from one link without buying anything.
- We're on Social Tables (or were on Prismm) and renewal is coming up. What's the move?
- Run both without committing. Billing here is monthly, so a trial can't outlive its welcome, and on Venue plans we convert your rooms for you at onboarding. Hotel sales and event managers reviewing Social Tables on Hotel Tech Report (as of August 2026) describe a tool that “crashes even when you are performing the simplest of tasks”; if that's the daily experience, importing one real event is the fastest comparison you can run. The Social Tables comparison and the Prismm migration guide cover timing — and venues that join before Prismm's October 1, 2026 view-only date lock the Founding Venue rate of $119/property/month for 24 months.
- What does the Venue plan cost, and what's the contract?
- Venue is $149/property/month, billed monthly with no annual commitment: every event space at the property, unlimited team members, the full production library, 3D, 300 copilot messages a month, a verified directory profile, branded share links, and concierge floor-plan conversion. Venue Lite is $69/property/month for a single event space, and Venue Pro is $299/property/month adding API, webhooks, and governance. An event space is one you book — back-of-house doesn't count, and neither do the airwall combinations we derive from a divisible ballroom. For comparison, Cvent's listed venue plans run $150–$320/month with a 12-month commitment (August 2026). Your data exports on any plan, any time.
Timing a switch? See the Prismm migration guide, the Social Tables pricing guide, and the full ladder on pricing. Working with outside production teams? Send them the AV & production page.
Every room set your property will ever need, from one drawing
Venue plans from $149/property/month — unlimited team members, monthly billing, and we convert your floor plans at onboarding.
No credit card required — and your team, your planners, and your clients never pay for seats