Abigail: The Salem Witch Trials — The Rock Opera: Thursdays-Saturdays, 8 p.m. Continues through Aug. 27. $15-$20. www.abigailtherockopera.com. Light Rail Studios, 672 Toland (at Bay Shore), 285-0259.
American Buffalo: Performance of David Mamet play. Wednesdays-Saturdays, 8 p.m. Continues through Aug. 27. $26-$38. Actors Theatre San Francisco, 855 Bush (at Taylor), 345-1287.
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 Book of Liz: Custom Made Theatre Company presents a play by David and Amy Sedaris. Thursdays-Sundays. Continues through Aug. 28. $20-$28. www.custommade.org. Gough Street Playhouse, 1620 Gough (at Bush).
The Business: A Comedy Show: Wednesdays, 8 p.m. $5. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
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.
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. Continues through Oct. 9. $117-$186. 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.
Mr. Harry: A tragicomedy involving a drought, a dog, and the Berkeley City Council. Thursdays-Saturdays. Continues through Aug. 27. $15-$20. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
The Nature Line: A play by J.C. Lee about a civilization in the turbulent stages of rebuilding itself after the apocalypse. Thursdays-Saturdays, 8 p.m. Continues through Aug. 27. $15-$17. The Phoenix Theatre, 414 Mason (at Post), 989-0023.
No Enlightened People Have Ever Come Out of the Ghetto: Theater performance. Fri., Aug. 26, 7 p.m. $20-$25. Alcove Theater, 414 Mason (at Geary).
Peaches en Regalia: A comedic play. Thursdays-Saturdays, 8 p.m. Continues through Aug. 27. $18-$24. Stage Werx, 533 Sutter (at Powell), 730-3433.
Secret Improv Society: Underground improvisational theater. Saturdays, 10 p.m. $15. Shelton Theater, 533 Sutter (at Powell), 882-9100.
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.
Tigers Be Still: A dark comedy involving graduate degrees, art therapy, family strife, and employers with guns. Tuesdays-Saturdays. Continues through Sept. 10. $20-$50. SF Playhouse, 533 Sutter (at Powell), 677-9596.
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), 888-775-6777.
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. Through Aug. 27; Wednesdays-Sundays. Continues through Sept. 18. $25. New Conservatory Theatre Center, 25 Van Ness (at Market), 861-8972.
Your F!#&ed Up Relationship: Improv based on real-life relationship problems supplied by audience members. Fridays. free. Alcove Theater, 414 Mason (at Geary).