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.
Assisted Living: The Musical: A musical comedy about getting old. Saturdays, Sundays. Continues through Aug. 14. $79.59-$99.50. 888-885-2844. www.assistedlivingthemusical.com. Imperial Palace, 818 Washington (at Grant), 888-885-2844.
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.
Country Club Catastrophe: A farce that deconstructs notions of class and servitude in America. Fridays, Saturdays. Continues through Aug. 13. $20. Exit Theatre, 156 Eddy (at Taylor), 673-3847.
Hand to Mouth: Commercialism: Comedians Sean Keane, Natasha Muse, and Miles K join James Fluty and Trevor Hill to deconstruct advertising. Fri., Aug. 5. suggested donation of $10. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
H.M.S. Pinafore: Play about love on the sea. Starting Aug. 5. Fridays, Saturdays, 8 p.m.; Saturdays, Sundays, 2 p.m. Continues through Aug. 7. $14-$47. Yerba Buena Center for the Arts, 701 Mission (at Third St.), 978-2787.
Left-Handed Darling: Foul Play Productions launches its New Writers' Program with a story of murder set in the Dustbowl era. Fridays, Saturdays. Continues through Aug. 14. $20-$30. Exit Stage Left, 156 Eddy (at Taylor), 673-3847.
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. Starting Aug. 4. Thursdays-Saturdays. Continues through Aug. 27. $15-$20. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
Peaches en Regalia: A comedic play. Starting Aug. 4. 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.
Tony 'n' Tina's Wedding: Saturdays, 7 p.m.; Fridays, 7 p.m. $88.50-$115.50. www.tonyandtinasanfrancisco.com. Swiss Louis Restaurant at Pier 39, 2 Beach (at Embarcadero), 421-2913.
Upper Cut Improv Showcase: Improv and sketch comedy. Fridays, 7 p.m. $5. San Francisco Comedy College, 414 Mason (at Geary), 921-2051.
Your F!#&ed Up Relationship: Improv based on real-life relationship problems supplied by audience members. Fridays. free. Alcove Theater, 414 Mason (at Geary).