Ingame "Regulars" chat ;

[Holsje]

You could just have a prefix for a minigame-only chat. Just like gangs, but with another tag than !

I still dont think there is a need to be disconnected from the main chat, if you would get distracted, you shouldn't be able to read the regular chat neither.

Mainchat has a lot more random in it.
And when explaining robbery to nabs its good to not have a command to talk in minigame chat...