Arthur in Underland: Performed by Dandelion Dancetheater. Fridays-Sundays, 8 p.m. Through March 18. $13-$24. CounterPULSE, 1310 Mission (at Ninth St.), 626-2060.
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.
Theatresports: Featuring BATS Improv team. Fridays, 8 p.m. Through March 23. $17-$20. Bayfront Theater, 16 Marina (at Laguna), 474-6776.
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.
Beggars in the House of Plenty: Written by John Patrick Shanley. Through March 19. $10. The Phoenix Theatre, 414 Mason (at Post), 989-0023.
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.
A Bright Room Called Day: A play by Tony Kushner about a woman who protects her circle of creative and activist friends from the Nazis' rise to power in 1930s Berlin. Thursdays-Sundays. Through April 8. $20-$32. Gough Street Playhouse, 1620 Gough (at Bush).
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.
Clayton and Gomes: Buddy Cops: Spoof of a TV cop show in which two partners solve a murder. Fridays, Saturdays. Through March 24. $20. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987.
Will Durst's Elect to Laugh: A comedy sketch chasing down the presidential election cycle. Tuesdays. $15-$35. The Marsh Theater, 1062 Valencia (at 22nd St.), 826-5750.
Geezer: Geoff Hoyle's solo performance on getting older. Thursdays, Saturdays, Sundays. Through March 18. $25-$35. The Marsh Theater, 1062 Valencia (at 22nd St.), 826-5750.
Improvised Shakespeare: Audiences chooses the title of every performance. Improv actors then create a completely original story in the style and language of The Bard. Saturdays, 8 p.m. Through March 24. $17-$20. Bayfront Theater, 16 Marina (at Laguna), 474-6776.
Julius Caesar: Adaptation of Shakespeare's Julius Caesar. Saturdays, Sundays. Through April 1. $10-$35. Buriel Clay Theater, 762 Fulton (at Webster), 762-2071.
Kipling Hotel: Don Reed's solo show. Saturdays, Sundays. Through May 6. $20-$50. The Marsh Berkeley, 2120 Allston (at Shattuck), Berkeley, (510) 704-8291.
A Lie of the Mind: A family drama by Sam Shepard. Through April 14. $15-$35. Boxcar Playhouse, 505 Natoma (at Sixth St.), 776-1747.
Maurice: An aristocratic Englishman declares his love for a male friend during a time when homosexuality is outlawed in Britain. Wednesdays-Sundays. Through March 25. $25-$45. New Conservatory Theatre Center, 25 Van Ness (at Market), 861-8972.
Merchants: No Nude Men Productions' story of two sisters caught in various quagmires while pursuing financial stability and career satisfaction. Thursdays-Saturdays. Through March 24. $5-$20. Exit Stage Left, 156 Eddy (at Taylor), 673-3847.
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.
Octopus's Garden: Play about ethical quandaries involving a same-sex couple, a kid, and the biological father. Saturdays, 8 p.m. Through April 7. $20-$25. Alcove Theater, 414 Mason (at Geary).
Previously Secret Information: In the words of the organizers: "Great stories, told well, with just the right amount of lies." We'll add: "Told by comedians, a lot of the time." Third Sunday of every month, 7 p.m. $10. Stage Werx 446, 446 Valencia (at 16th St.).
The Real Americans: Dan Hoyle's one-man show. Fridays-Sundays. Through April 14. $25-$50. 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.
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: Fridays, Saturdays, 7 p.m. $88.50-$115.50. www.tonyandtinasanfrancisco.com. Imperial Palace, 818 Washington (at Grant), 956-9888.
The Vagina Monologues: A production of Eve Ensler's readings by women held in conjunction with V-Day, an worldwide effort to end violence against women. Proceeds benefit Bay Area Women Against Rape. March 14-15, 8 p.m. $15. Uptown Nightclub, 1928 Telegraph (at 19th St.), Oakland, (510) 451-8100.
The Waiting Period: Solo performance about depression by actor, playwright, author, and talk show host Brian Copeland. Fridays, Saturdays. Through April 27. $20-$50. The Marsh Theater, 1062 Valencia (at 22nd St.), 826-5750.
What About Ben? : Written by Lee Brady. Thursdays, 7:30 p.m.; Sundays, 7 p.m. Through April 1. $30. The Thick House, 1695 18th St. (at Arkansas), 401-8081.