One count
One party. No sittings to keep track of.
A wedding splits into a ceremony, a send-off and a reception, and each has to be counted apart. A birthday does not. Leave the sittings off entirely and the door simply counts the party — everyone who has arrived, against everyone who said they would.
- No sittings to set up, because there is only one
- The door counts the whole event rather than a slice of it
- Works on your phone at the gate, or on the sofa beforehand



