In short. Attendance tells you the room filled, not that it worked. The measures that matter are verified attendance against RSVPs, how many people spoke to someone new, how many of those conversations continued after the event, and repeat attendance at your next one.
Most post-event reporting measures the event’s marketing, not the event. RSVPs tell you the invitation worked. Attendance tells you the date suited people. Neither tells you whether anybody in the room got anything out of being there.
That gap matters, because it is the thing a sponsor is actually buying and the thing an attendee decides on when your next invitation arrives.
The six that are worth collecting
1. Verified attendance against RSVPs. Not the sign-in sheet, which is optimistic, and not the RSVP count, which is more so. The gap between the two is the single most useful number you have: it tells you how much to over-invite next time, and a widening gap is an early warning that the format is tiring.
2. Share of the room who met someone new. The point of the evening. If three quarters of a room is people who already know each other, you have run a pleasant social and not a networking event. This is the number most organisers avoid asking about.
3. Conversations that continued afterwards. The honest test. A conversation at the event is a nice evening; a conversation the following week is a result. Any measure taken on the night overstates the outcome.
4. Introductions that led to something. Rarer and slower, and worth more than the rest combined. One piece of work won through your room is worth more in a renewal conversation than a photograph of a full venue.
5. Repeat attendance. The compound measure. People come back to rooms that worked for them, and they do it without being chased. If repeat attendance is flat while your invitation list grows, the room is not working and your marketing is covering for it.
6. Who you are actually convening. Not a vanity count of job titles, but whether the mix matches what you promised. A room sold as founders and funders that turns out to be two funders and sixty service providers has an honesty problem that will show up in repeat attendance within three events.
What not to measure
Satisfaction scores. People rate events on the venue, the coffee and whether they had to stand up. It is a measure of hospitality, which is worth knowing, and it is not a measure of outcome.
Business card counts and LinkedIn connection counts. Both measure activity, not value, and both reward the person who worked the room hardest rather than the room that worked.
Anything you can only get by surveying people twice. Response rates on a second survey are low enough that what comes back is a sample of the enthusiastic, which flatters the result.
Collecting it without becoming a nuisance
The practical problem is that the measures that matter happen after everyone has gone home, which is exactly when nobody will fill in your form.
Three things make it tractable:
- Verify attendance at the door rather than asking later. A QR check-in takes a second and gives you a real number rather than an estimate.
- Measure outreach rather than asking about it. If the introductions happen on a platform, the count exists already. Nobody has to be surveyed about a conversation the system can already see happened.
- Use your next event as the survey. Repeat attendance is a revealed preference and it costs nothing to collect. People vote with the diary.
What The Gantry shows an organiser
For our own Rooms, the analytics are deliberately limited to outcomes:
- RSVPs and verified attendance from QR check-in
- Nudges sent and accepted
- Post-event connection requests made in the 7 days after the event
- The delegate journey, from an uploaded list through to introductions made
- Repeat attendance across your events
And deliberately not: message contents, attendee email addresses, or who skipped whom. An organiser never sees inside a conversation. That boundary is why delegates are willing to use it at your event, and giving it up would produce a better dashboard and a worse room.
All of it is free. Analytics is not a paid tier on The Gantry.
Working out what it cost you
Once you have the three counts above, the cost per connection calculator turns them into the figure worth reporting: not cost per head, but what you paid for each conversation that was still alive the following week. It calculates from your own numbers and asserts no benchmarks of its own.