Shitty.. Once at the Dismember gig in Rochester my friend forgot to bring ID and it was only an 18+ show and he couldnt get in.. he was 20 at the time too. That was at the Penny Arcade, and they were fucking pricks all the time.. so I guess it depends on the venue, have you been to shows there before? 21 and over shows are shitty for the bands, because a lot of the people that do go to the shows are under 21..