FILM: Homoerotic gem, Top Gun, will screen at the last Film Night in the Park of the season. Be sure to catch that delicious volleyball scene (if the inflatable screen doesn't blow away, that is)! (8 p.m., Dolores Park, Dolores and 19th)

DERBY: Check out some beautiful wooden cars in action at the 6th Annual Hell's Belles Pinewood Derby and Silent Auction, featuring hot-rod, pinup, and tattoo-related art in a variety of media including photography, painting, books, sculpture or clothing and accessories. One-hundred percent of the proceed go directly to the Bay Area Women's and Children's Center. (6 to 9 p.m., 941 Geary Gallery, 941 Gallery)

PHOTOGRAPHY: Moholy Ground Magazine celebrates the launch of its third issue, featuring the premiere of the new DJ group " Pop Masters" DJ Boom Bostic and Gabu Chan playing pop jams from all genres, all on vinyl, along with food by Tacolicious and wine provided by Eric Wilhelm Wine Company. (7 to 11 p.m., PhotoboothSF, 1193 Valencia Street)