Bookwhen doesn’t have a built-in option to set a minimum attendee requirement. However, you can manage events with a minimum number of attendees in the following ways:
Manually set a capacity
Monitor your bookings and cancel the event if it doesn’t reach the required number of attendees.
Use a waiting list event
Set up a waiting list-only event and open the event’s capacity once enough people have registered their interest.
This method doesn’t guarantee bookings, so please proceed with caution.