I love the rooms idea. I think some other rooms would be great to have in the game as well. Also the main character should have his own room that cam be changed as well.
Love Room - Increased love points gained
Mating Room - This room will be dangerous as it max the girls heat everyday. This will mean you will get attacked way more often.
No Nut Room - This will continue to increase heat. Yet no one is allowed to attack sex anyone while they have this room. This room will be the only temporary room and disappears after a month in the game.
Kinky Room - This will show what kinks each girl is into. Also giving the main character new poses to use.
Relaxation Room - Reduces the girls heat.
Gloryhole Room - This room that gives new poses but only while a girl has this room. If every girl has this room and any girl is a futa they can use the gloryhole as well.
These rooms can also be used on the main character room.
Also a fun character would be a ghost girl follows you can tries attack you sexually from time to time.