"A few have tried and failed so far." He means to say he's been able to stop any incidents from getting out of hand, that is. Luckily he can be very persuasive before some kind of force ever has to be used.

"But the night is still young and there are not nearly enough drunks at the bar yet." He pauses in thought, then quickly adds: "Thank you for not being one of them." Humor laces his tone, subtle, but there.

He really is grateful when someone cooperative comes along, though.