Public and Private Chat Room
There are public and private chat rooms. The public rooms allow everyone chatting there while private rooms don't. The administrator can establish a new private room which allows some users chatting to each other there. And if needed, administrator can also set a password for the private chat room.
The new private rooms won't be cancelled even if there is nobody online.
The room information, including its type, name, administrator, max user number and number online, could be seen for everyone to select one to enter.