These musicians may claim Pedro the Lion as a musical influence, but they are much more like hardcore favorites Bleeding Through when it comes to contagious onstage energy that gets the crowd into a fervor. At the Warped Tour last summer, fans at the Letter Kills' stage created an insane circle pit that didn't stop despite the desert heat. Luckily for those who couldn't handle the sunshine in June, the band will be playing indoors this time. So, no excuses. Not even from the emo kids.