Eight bands, two nights, and funds raised for both the Empower Program, which battles gender violence, and Second Genesis, which works with recovering addicts—Positive Force is working overtime this weekend. Tonight’s show features Girls Against Boys, finally about to release its major-label debut, with Quixotic (the new group featuring Slant 6’s Christina Billotte) and Meat Joy; Saturday brings Smart Went Crazy, Dischord’s only cello-packing band, with the Most Secret Method, the Better Automatic, Bald Rapunzel, and El Niño. At 9:30 p.m. tonight at the Black Cat, 1831 14th St. NW. $6. (202) 667-7960; and 6 p.m. Saturday at First Congregational Church, 10th & G Sts. NW. $5. (301) 270-2982. (Mark Jenkins)