[stan_the_man]

As others have said, they're free for everyone. Unless things have changed, they do 3 sets a night around 5/7/9pm-ish, so you should be able to catch a whole set easily enough.

We've queued up before for Wilson Philips and got front row, walked in for Smash Mouth and got 3 rows from front, and stood at the back for Sugar Ray and Starship. All were great from wherever you sit/stand really. You could even time it to grab a QS at Liberty Inn (or whatever it's going to be refurbed as) and sit eating outside while listening to them.