Joan Jett, Sonia Dada and Karl Denson's Tiny Universe were the major draws of last year's LoDo Music Festival. But tucked away from the main stage, quarantined in the dirt like some flea-infested sideshow, the funky members of Log held court for late-night stragglers not quite ready to call it a night. And in the midst of all the hip-swaying grooves and flying sparks from the band's industrial grinder, something wonderfully spontaneous happened: A conga line broke out. Fueled by roller-skating beauties and rowdy drunks in animal costumes, the line eventually ensnared even security personnel and people who'd been heading for the exits. Brief but oh-so passionate, it was the kind of joyous outburst that would have made Federico Fellini proud.