Prancing about all the while was MC-substitute drag diva Satine Harlow. Promptly at 9 p.m., toned and tanned go-go boys took the stage in their undies to gyrate their hips around glowing, rainbow-colored hula hoops as chiseled men in their crotch-clutching swimsuits trickled into the venue. (probably because of Tabu’s Bearlesque at 10), the euphoric sex-on-the-beach atmosphere was full throttle from the get-go. And though the summer soiree didn’t heat up until shortly after 11 p.m. Titillating twinks, beefy bears, macho muscle studs, a bevy of queens gawking from a distance - to be sure, there was no lack of diversity (or sexual chemistry) populating this year’s Main Event. If your gay-boy libido didn’t kick into overdrive at PhillyGa圜alendar’s Boys of Summer event on Saturday at Voyeur, you should probably see a doctor - pronto.