You do not need to register the room or your name everytime you enter it. Yes, Your chatters do not need to register a nick unless you are going to give them @ privaleges. then they will need to register.
Remember, if you do not enter your password when you log in, you will need to /Identify password when you are in your room to have your own privalges.
~~~Misty~~~{@ Im the little one...and mysterious one