I wanted to thank E/everyone for the reponses. Every chat room that I have gone into has its own protocol, I've noticed. I would never call a Dom "Master," since no one here is my Master and that title is reserved for the subs/slaves of that Dom. And there doesn't seem to be many Goreans here. I have been instructed in other chat rooms where Goreans frequent to call the free men as "Master." But I started doing that years ago when I was in Gor and I still do, even though I am no longer a kajira.
If a person comes into the room and it is not immediately noticeable that person is a Dom/me, then I check the profile just to make sure. So far E/everyone has been very nice and polite when it comes to me addressing Them as "Sir" or "Ma'am." No one has jumped down my throat about it, and I appreciate that! It's just that I've called Dom/mes by these titles for so many years now that it's hard to stop doing so. At least I know that I'm not stepping on too many toes and people have been nice about it so far.