A workshop has filled up and further people cannot sign up. There is no wait list in Happenee, so the situation is not handled by the system but by you — either you raise the capacity, add a second run, or offer people an alternative. What matters is reacting before the people who missed out start asking.
Look at workshop occupancy in the agenda while registration is still open, not a week before the event. A workshop that fills up three weeks ahead is information you can act on; one that fills up the day before is just a problem.
Raise the capacity. The simplest route if the room and the facilitator can take it. You edit the capacity in the session settings; the new places are offered to the next people immediately.
Add a second run. For a popular workshop this usually beats an overcrowded room. You create the new session by copying the original, so you do not have to rebuild the settings.
Offer an alternative. When neither of those works, tell people which workshops still have space. Without that they stop at "it was full" and never sign up for anything else.
The system does not tell anyone that capacity ran out — that is on you. The fastest route is a notification in the attendee app: it arrives as a push notification and suits a short message such as "workshop A is full, B and C still have space".
When the change is substantial (a second run, a time shift), send an e-mail campaign targeted at the affected group.
No setting will do this for you. If you need a queue, you keep it outside Happenee and assign people to freed-up places manually — you can add them to the session's registered list. People added that way are marked as Assigned by organizer.
A number in the admin does not make the room bigger. Before you raise capacity, confirm the room's real capacity and check with the facilitator whether the format survives a larger group — for a workshop with group work, that is the difference between a good and a bad experience.
An attendee who hits a full workshop and hears nothing usually does not sign up for another one. A short notification saying where space is left saves more attendance than anything else.
If somebody signs up for a session before you set its capacity, you can end up with more registrations than the limit. So set capacity when you create the session, not afterwards.
