Currently Smores forces you to enter the first room it finds or the last room you were in.
Also there is a sweet bug that will cause you to aparently stop receiving messages if you are only active in 1 room and you get kicked from that room. You are properly not active in that room, but Smores makes it seem like you are still active even though you aren't because Smores doesn't know what to do with not being active in any rooms.