Calendar round robin and collective booking mix

Booking for a appointment for which flexible hosts are always needed, and these rotate through the booking process like a round robin.

Example: 10 members are added to this calendar. For the appointment, for example, 2 members are needed per slot. For example, member 1 and member 2 are booked for the first slot. Then, 2 of the unbooked members: 3, 4, 5, 6, 7, 8, 9, and 10, should be bookable for the next booking slot, and so on. Maximum bookings per slot (per corresponding host group number)