This was no piano recital. The energy outside the 9:30 Club on Saturday morning made that clear. As the crowd grew down the block waiting for the doors to open, some of the bands and camp counselors were gathered at the rear entrance, standing on the back of a U-Haul truck, posing for pictures and filing inside in pure rock-and-roll style. This was also unlike any summer camp most of us have ever dreamed of. “Have your I.D.’s ready,” a 9:30 staffer announced at the door. “This is a regular show.”