Not sure how to solve this one....
I have Room A which can be split into Room A1 and Room A2
If Room A is booked, then automatically Room A1 and Room A2 are booked.
If Room A1 is booked, then Room A2 is available and Room A is not available.
If Room A2 is booked, then Room A1 is available and Room A is not available.
Is this possible? Imagine this is a room with a divider in the middle.
Or imagine a room with 2 dividers in it to make 3 sub rooms...and so on...