Definately fake. Security would have tackled that fucker as soon as he hit the stage.
Most shiitty little comedy clubs don't even have security.
I think it was real. Pauly was backing up and apologizing as the guy approached him. Had it been a setup, Pauly would've gotten nose to nose with the guy.
As far as the punch, the guy isn't a pro fighter, probably hadn't thrown a punch in a while and wasn't warmed up. The punch SHOULD'VE looked bad.
People might think I'm naive to believe this, but it's also naive to think EVERYTHING is a setup.