As far as i understand, all houses are planned with full FC in mind, so all the rooms on all the houses filled should be fine, yet, how many do have 100+ members in their fc? Or even IF, 100+ that bother having a room.

So yes please, let us have some Rooms so you could make a bath, Library or weapon room - but also give FC masters the power to create such rooms for collective rooms, let me use a few for a distinct purpose.