You can customise the default set of booking types in Group sales. 

Steps

1. In Group Sales, go to Settings > Booking types.
2. Add as many booking types as you need.

   Note: The booking types you create are sub-types of Group Sales default booking types. For example, if you create a Private booking sub-type, bookings you assign that sub-type to will behave as if they are private bookings.

See Also:

Booking and event types