I was about to respond the same, Ebs.
Good thing about Grim Batol is that they're used to seeing multiboxers in Orgrimmar.

And good thing about Gimp is that everyone can just do what they want as long as they behave. I think some even close guildchat when in an instance, or when they don't want to be disturbed. And always handy to have someone to talk to about your multiboxing tactics or setup.