I would like a way for attendees of a particular service instance to specify how many people are are in their party being booked for that service, so that will automatically be accounted for in the maximum number of attendees. E.g., if I provide a service with max 10 attendees, when making a booking, a customer can specify 3 people in their party, so now the bookings website knows there is room for 7 more people. Is this possible?
