QuickCal / Booked - Options for Multiple Bookings / Quantity
In the plugin, generally speaking each booking is for one time slot (or space, ticket, etc). Each time someone goes through and makes a booking, the available slots (spaces, tickets) for that time will decrease by one. There are however some options that may work for you.
To have a quantity option, there are a few potential configurations:
1. You can add a dropdown as a Custom Field in QuickCal so that during the booking process, they can set the number of people. That number would not connect to the QuickCal time slots, but it would come through in the booking info.
Custom field info here: View article
2. Or if you are wanting to accept payments with the booking, this method shown here could be a good option instead: View article - again with the caveat that the available slot # does not correspond with that quantity.
3. Another option including payments is to set it up for purchasing one slot, and then use the option to direct customers to the Cart page, which includes a quantity option, before the Checkout page. The same caveat as #2 applies. The benefit here however is that you can create simple products instead.
4. If none of those options is ideal, you could leave out the quantity selection and include information on the booking page (or booking form) instructing customers to go through the booking process for each member of the group, or for each slot they intend to purchase. In this case, since each booking would be for one slot, the available number of slots would decrease by the correct amount each time. Here is an example of that flow: View screenshot
If you have any questions, please feel free to open a ticket.