Audium 9: Spatial electronic orchestrations and sound sculptures. Early arrival is advised. Fridays, Saturdays, 8:30 p.m. $20. Audium-Theatre of Sound-Sculptured Space, 1616 Bush (at Franklin), 771-1616.
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.
Becky Shaw: A couple on a blind date is set up by a married couple in this comedy thriller. Tuesdays-Saturdays. Through March 10. $20-$70. SF Playhouse Stage 2, 533 Sutter (at Powell), 677-9596.
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), 433-3040.
The Business: A Comedy Show: Sketch and stand-up comedy. Wednesdays, 8 p.m. $5. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
Future Motive Power: A theatrical performance in the Old Mint. Fridays-Sundays, 8 p.m. Through Jan. 29. $15-$30. 967-1574. www.mugwumpin.org. Old Mint, 88 Fifth St. (at Mission), 967-1574.
Humor Abuse: Lorenzo Pisoni's one-man show. Tuesdays-Sundays. Through Feb. 15. $9.50-$85. American Conservatory Theater, 415 Geary (at Mason), 749-2228.
Little Brother: A production adapted from the novel by Cory Doctorow. Thursdays-Sundays, 8 p.m. Through Feb. 11. $25-$32. Gough Street Playhouse, 1620 Gough (at Bush).
Monday Night Marsh: Musicians, actors, performance artists, and others stage works in progress. Mondays. $7. The Marsh Theater, 1062 Valencia (at 22nd St.), 826-5750.
Not Getting Any Younger: Solo performance by Marga Gomez. Fridays, Saturdays. Through Feb. 25. $15-$35. The Marsh Theater, 1062 Valencia (at 22nd St.), 826-5750.
Secret Improv Society: Underground improvisational theater. Saturdays, 10 p.m. $15. Shelton Theater, 533 Sutter (at Powell), 433-3040.
S.F. Sketchfest: Annual festival of performances that includes comedy, sketch, film, and music. Jan. 19-Feb. 4. varies. www.sfsketchfest.com. Multiple San Francisco locations, multiple addresses.
Shopping! The Musical: Songs and sketches about shopping. Fridays, Saturdays, 8 p.m. $23-$29. www.shoppingthemusical.com. Shelton Theater,533 Sutter (at Powell), 433-3040.
Some Thing: Art drag night with craft table. Fridays. $5. The Stud, 399 Ninth St. (at Harrison), 863-6623.
Tony 'n' Tina's Wedding: Friday, Saturdays, 7 p.m. $88.50-$115.50. www.tonyandtinasanfrancisco.com. Imperial Palace, 818 Washington (at Grant), 956-9888.
Waiting For Godot: Samuel Beckett's absurdist play. Thursdays-Saturdays. Through Feb. 18. $20-$38.www.tidestheatre.org. Royce Gallery, 2901 Mariposa (at Harrison), 558-1749.
Your F!#&ed Up Relationship: Improv troupe does show based on audience members' real relationship scenarios. Fridays, 10:30 p.m. free. Alcove Theater, 414 Mason (at Geary).