    By the time Marco Benevento (keyboards) and Joe Russo (percussion) come out onstage to guest, the atmosphere in the club is positively electric. With Potter\'s natural, hip-swaying charisma and the Nocturnals\' muscular musicality having already fanned the flames, the expanded ensemble\'s rousing, so-funky-its-stanky version of Dr. John\'s Right Place, Wrong Time is like spraying gasoline on the fire. And for the final number, a holy-rollin\' gospel boogie rawker called \'Nothing But the Water\' (from the 2006 album of the same name), Grace, Scott, Matt and Bryan pull out all the stops, channeling everybody from Aretha Franklin to Humble Pie to the Jon Spencer Blues Explosion to My Morning Jacket. As I glance around the room and take stock of the heaving, stomping crowd I could swear I spot several audience members spontaneously combusting.<br /><br />Burn, baby, burn.