You must finish in two minutes or less at the Air Sex World Championships at the The Howlin' Wolf (907 S. Peters St.), but at least style counts. Aside from relevant state law and city ordinances, there are few rules in air sex competition. A la air guitar, solo contestants get to strut their best stuff to the music of their choice. Props are allowed, but nudity isn't. The winner advances to regional finals. Visit www.airsexworldchampionships.com to register. For those who just like to watch, it's $8. Doors open at 9 p.m. Thu., Aug. 19.