Follow the whistling, or the sweat droplets.
Seriously though, your best bet is to just find a show that is all ages. You probably don\'t want to mess around with a fake ID. Bars are getting tougher and tougher about ****ing out underagers. Many places have machines that scan the IDs. It would really suck to travel somewhere and not be able to get in, or worse, get in trouble for trying.
It sucks, I know. I was there once too.