Adam,
Hiding the room from specified users that is not part of the same group wont help much since you can enter the room by the url directly. I am thinking, what if protecting the room with a password? there should be a way to enter the room so the normal user not to see the password prompt dialog and to enter the room directly.
Actually what i want to do is not to use the room screen anymore where the users have to select the room in order to enter, but when they login into the site to get automatically in theyre group room. I also want to prevent random people to just connect to the room by entering the url.
In conclusion is there a way to enter a room that has a password set directly using the url address ? (so the user don't have to enter the password manually). Or maybe you have a better solution?