Appointments Plus Question about Group Appointments

Hi,

I am interested in using this plugin for a client that is looking for an appointment booking system for a few different possibilities. Is there a way to allow users to sign up for a group class that only occurs 1 time per week? My client offers both private classes and some group classes, but I cannot figure out how to limit the calendar with the group classes to only show this at a certain day and time. I would like to keep the calendar open at other times for individual appointments, so limiting this fully with the “Working Hours” is not a good choice.

Thanks

Matthew