Dancers! Dancers! The only way a band knows that their audience is enjoying themselves, short of a shower of (preferably female-oriented) undergarments, is if that audience is spinning around with their arms in the air, spilling their beverage. Years of careful study of the dancing phenomenon tells us that it's always the ladies who lead the dancing wave, eventually dragging in the usually reluctant males. The males at this event didn't seem all that reluctant, though!