Hysteria Dance Company designer Ryan Heffington and his troupe of busy avant-garde dancers take over Charlie O's for this month's Fingered party, a combination dance class, performance, and bacchanalia featuring the kind of sensual, eye-popping moves that make indie-dance lovers swoon. The instructional part comes early in the evening, followed by a steamy DJ set from the Count of Monte Disco before the main event: the debut appearance of fashion/performance collective We Are the World.