Many customers book into the same time slot, each taking one of a fixed number of spaces. Unlike an appointment app, where one customer gets the whole slot, your 6pm session takes bookings until its spaces run out. Session prevents overbooking and shows customers how many spaces are left.

Spaces, not appointments
A space is one place in the room - the unit your capacity is measured in. Each booking takes one or more spaces, so a 10-space session could be ten people booking one each, or one person booking four and others filling the rest. When the last space goes, the session shows as full and stops taking bookings.
Set capacity per session
- 1Open the Sessions page and create or edit a session.
- 2Set Spaces available this session to the number of people the room comfortably holds, then save.
The capacity hierarchy
Session uses the most specific capacity that's set:
- Single-session override - a capacity set on one date wins over everything else. See override a single session.
- Schedule capacity - the Spaces field on a time in a repeat schedule, for every session that time generates. Blank follows the session default. See different spaces at different times.
- Session default - the capacity on the session itself.
Most venues set it once on the session. Use a time's Spaces field when one slot is always bigger (say a second room opens in the evenings), and a single-session override for the odd day with fewer or more spaces. Lowering capacity below current bookings never cancels anyone - the session just stops taking new ones.
Overbooking prevention
Session checks capacity at the moment of booking, so two customers can't claim the last space at once. A full session shows as sold out, and a waiting list appears automatically, emailing customers when a space frees up.
Group and private bookings
- Group bookings let one customer book several spaces while others book the rest.
- Private sessions let one customer book out every space.
Both are priced as a single unit and capped to the session's real capacity.
Limit spaces per booking
By default a customer can book as many spaces as are available. To keep sessions open to more people, click Limit bookable spaces per person under the capacity and set Max per booking. A single multi-space price like private hire is exempt, since it's sold as one unit.
Common questions
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How do customers choose how many spaces? Each session on the booking page shows its remaining spaces and a quantity stepper, up to the spaces left and any per-booking limit.
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Do shorter bookings share the same capacity? Yes. With part-session pricing, shorter and longer bookings draw on the same spaces.
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Can customers change their booking afterwards? See how customers manage their own bookings.
Next, build a repeat schedule, override a single session, or browse all sessions and scheduling articles.