I dont know about anybody else but for me it doesnt work that way, if I look at a roomlist and I see 10 rooms with only 3 people in it and I see a room with 50 then I will try the busy room, numbers do attract imo because if everyone is in that busy room it must be fun to be in. You need active hosts to keep people around for chatting, you need the hosts to talk in the room and not whisper all the time or idle 24/7.
I mean who's going to chat just for idling? yes to keep open a room if you are a room owner, but visitors dont come to idle, they come to chat and if the room is dead they move on, logical to me.