Class waitlist

A class waitlist holds members who wanted a spot in a full class and moves them into it automatically when someone cancels. It turns a cancellation — which would otherwise be an empty spot — back into an attendance, without anyone at the gym having to notice or intervene.

1. Class reaches capacity. Booking closes.
2. Further members join the waitlist instead, in order.
3. Someone cancels. The first person on the list is booked in and notified.
4. If nobody cancels, the waitlist expires when the class starts.

The notification is the whole mechanism. A member promoted off a waitlist an hour before a class they don’t know about is a no-show waiting to happen. Promotion has to reach them somewhere they’ll actually see it.

Two different answers to the same problem.

• Waitlist — capacity is honest. Extra members wait, and only get in if a spot genuinely opens.
• Overbooking — you deliberately book past capacity, betting on a predictable no-show rate.

Overbooking works for airlines because they can compensate their way out of it. A gym can’t: if everyone turns up, someone gets turned away at the door, and that member remembers it far longer than the free class you offer them. Use a waitlist.

A waitlist is the cheapest attendance you’ll ever get. The demand already exists and the member already tried to book — all the system has to do is notice a spot opened.

It’s also your best capacity data. A class that consistently runs a waitlist is telling you to add a session or a larger room, and it’s telling you before members get frustrated enough to leave. A timetable without waitlists hides that signal completely: every full class looks identical, whether two people wanted in or twenty.

When a class fills, members join the waitlist instead of hitting a dead end, and get moved in automatically when a spot opens. Combined with a cancellation window that pushes cancellations earlier, most freed spots get filled rather than sitting empty.