I would be careful with the use of PUG as its a common gaming term for pick up game, in MMO's its usually for pick up groups. People coming from other games that don't know this one might get confused or they might not. Heck they might not even know what a PUG is either so who knows.

At least in my generation pug was a common term being used. I haven't really played many new MMO's so I'm sorta out of the loop I guess.