All Atheists Are Muslim: A solo performance by Zahra Noorbakhsh. Thursdays-Saturdays, 8 p.m. Through Oct. 1. $20. Stage Werx, 533 Sutter (at Powell), 730-3433.
Beach Blanket Babylon: Steve Silver's musical revue spoofs pop culture with extravagant costumes. Wednesdays-Sundays. $25-$130. Club Fugazi, 678 Green (at Powell), 421-4222.
Big City Improv: Actors take audience suggestions and create comedy from nothing. Fridays, 10 p.m. $15-$20. www.bigcityimprov.com. Shelton Theater, 533 Sutter (at Powell), 882-9100.
The Business: A Comedy Show: Wednesdays, 8 p.m. $5. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
Fauxgirls!: Drag revue. Third Saturday of every month, 10 p.m. free. www.fauxgirls.com. Kimo's, 1351 Polk (at Pine), 885-4535.
Free Shakespeare in the Park: Free theater in the main lawn. Sundays, 2:30 p.m.; Saturdays, 7:30 p.m. Continues through Sept. 23. The Presidio, Park Presidio (at Lake), 561-4323.
Geezer: Geoff Hoyle's solo performance about what it's like to grow old. Thursdays, Saturdays, Sundays. Continues through Sept. 18. $20-$50. The Marsh, 1062 Valencia (at 22nd St.), 826-5750.
How to Make Your Bitterness Work for You: Solo comedy piece written and performed by Fred Raker. Sundays, 2 p.m. Through Sept. 25. Stage Werx, 533 Sutter (at Powell), 730-3433.
Joy with Wings: A Daughter's Tale: Written and performed by Becky Parker. Wed., Sept. 14, 8 p.m. $32-$50. Alcove Theater, 414 Mason (at Geary).
Maestro's Enchantment: A story of romance between an illusionist and the leader of an 18th-century circus troupe. Features aerial acts, music, and a five-course dinner. Thursdays-Sundays. Through Oct. 9. $117-$186. love.zinzanni.org. Teatro ZinZanni, Piers 27 and 29 (Embarcadero and Battery), 438-2668.
Monday Night Marsh: Musicians, actors, performance artists, and others take the stage at this regular staging of works in progress. Mondays. $7. The Marsh, 1062 Valencia (at 22nd St.), 826-5750.
Night Over Erzinga: Written by Adriana Sevahn. Sundays, 2 p.m.; Fridays, Saturdays, 8 p.m.; Thursdays, 8:30 p.m. Through Oct. 9. $20-$36. Fort Mason, Southside Theater, Marina (at Buchanan).
Not Getting Any Younger: Comedian Marga Gomez performs solo. Thursdays-Sundays. Through Oct. 23. $15-$50. The Marsh, 1062 Valencia (at 22nd St.), 826-5750.
Secret Improv Society: Underground improvisational theater. Saturdays, 10 p.m. $15. Shelton Theater, 533 Sutter (at Powell), 882-9100.
SF Fringe Festival: Annual unjuried theater festival. Through Sept. 18. $10-$12.99. www.sffringe.org. Exit Theatre, 156 Eddy (at Taylor), 673-3847.
Shopping! The Musical: Songs and sketches about shopping. Fridays, Saturdays, 8 p.m. $23-$29. www.shoppingthemusical.com. Shelton Theater, 533 Sutter (at Powell), 882-9100.
Show Ho: Starring Sara Moore. Thursdays-Saturdays, 8 p.m.; Sun., Oct. 9, 2 p.m. Through Oct. 9. $20-$32. New Conservatory Theatre Center, 25 Van Ness (at Market), 861-8972.
Star Trek Live: The Way to Eden: A re-enactment of the original television series. Fridays, Saturdays, 8 p.m. Through Sept. 24. $20. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
Tony 'n' Tina's Wedding: Saturdays, 7 p.m.; Fridays, 7 p.m. $88.50-$115.50. www.tonyandtinasanfrancisco.com. Imperial Palace, 818 Washington (at Grant), 956-9888.
Upper Cut Improv Showcase: Improv and sketch comedy. Fridays, 7 p.m. $5. San Francisco Comedy College, 414 Mason (at Geary), 921-2051.
Waiting for Giovanni: A new play by Jewelle Gomez. Wednesdays-Sundays. Through Sept. 18. $25. New Conservatory Theatre Center, 25 Van Ness (at Market), 861-8972.
Why We Have a Body: A lesbian private investigator follows men suspected of cheating on their wives. Tuesdays-Sundays. Through Oct. 2. $20-$60. Magic Theatre, Fort Mason, Bldg. D, Marina & Buchanan, 441-8822.
Your F!#&ed Up Relationship: Improv based on real-life relationship problems supplied by audience members. Fridays. free. Alcove Theater, 414 Mason (at Geary).