It would be very helpful to my organization to be able to add a multi-person party to an event at once, in such a way that the participant count was properly affected. We would use this in two different situations:

* Getting accurate headcount reporting, especially after the fact for walk-ins. If we have a finger painting class, we're not going to collect detailed constituent information on the 20 kids who show up as walk-ins, so we'd like the ability to create a 20-person walk-in participant line for the event so we can report how many people attended.

* Enforcing capacity more efficiently - if we're enforcing capacity for an event, and John Smith signs up for a party of 5, we currently need to sign up John Smith, plus Smith Guest 1, Smith Guest 2, etc., one line at a time. I'd like the ability to create John Smith + four guests on one line, in such a way that the "registered" count is properly incremented, to prevent overbooking an event.