Hi guys how is everyone's new year?
This is the protocol I was explained when I first got into the lifestyle in the 70"s lol

Dominates should be call Sir/Ma'am for the respect of being a dominate.

Now the term Master/Mistress is used only in 2 case's first case is the slave call her Dominate Master/Mistress only because that is what they are too them everyone else call's them sir/Ma'am.
Now the second case that some one is called Master/Misstress is if they a Expert in something like rope bondage the whip etc.. But when they are introduced as say Master John he is a expert in the whip. Then everyone should gave him the respect and call Him Master John.

So if your in a club in chat or a D/s M/s setting yes you should give resoect too all Dominate by calling then Sir/Ma'am. They should not tell you too cal them Master or Misstress unless you are there slave.