Beach Blanket Babylon: A North Beach perennial featuring crazy hats, media personality caricatures, a splash of romance, and little substance. Fridays, Saturdays, 7 & 10 p.m.; Wednesdays, Thursdays, 8 p.m.; Sundays, 1 & 4 p.m., $25-$65, www.beachblanketbabylon.com. Club Fugazi, 678 Green (at Powell), 421-4222.
The Better Half: The U.S. premiere of a lost Noel Coward play. Through May 3, 8 p.m., $20-$69. The Hypnodrome, 575 10th St. (at Bryant), 248-1900, www.hypnodrome.com.
Defending the Caveman: The longest-running solo play in Broadway history explores the battle of the sexes. Wednesdays-Sundays. Continues through April 27. Marines Memorial Theater, 609 Sutter (at Mason), 771-6900, www.marinesmemorialtheatre.com.
DIVAfest: Plays and performances by women artists. Fridays, Saturdays. Continues through April 26. Exit Theatre, 156 Eddy (at Taylor), 673-3847, www.sffringe.org.
Ghosts and Girls: The Legend of the Morning Glory: Supernatural drama by Brenda Wong Aoki. Fri., April 25, 8 p.m.; Sat., April 26, 2 p.m. Jewish Community Center of San Francisco, 3200 California (at Presidio), 292-1200, www.jccsf.org.
John Williams Is a Dick: The SPF7 troupe faces the bad things in life. Fri., April 25, 8 p.m.; Sat., April 26, 8 p.m. Dark Room Theater, 2263 Mission (at 18th St.), 401-7987, www.darkroomsf.com.
Murder Mystery Dinner: A murder mystery dinner that begins with detectives gathering to split $5 million in royalties from their latest book. Includes fruit and cheese reception and three-course dinner. Call for specific date. Saturdays, 6 p.m., $95, www.incentivestointrigue.com. Queen Anne Hotel, 1590 Sutter (at Octavia), 441-2828.
Out Cry: The International Theatre Ensemble presents Tennessee Williams' play. Starting April 25, Fridays-Sundays. Continues through June 1. The Next Stage, 1620 Gough (at Bush), www.wehavemet.org.
Riches:Lee Blessing's drama about a marriage that goes wrong. Through April 27. Phoenix Theatre, 414 Mason (at Geary), Suite 601, 989-0023.
Son of Sam I Am:Samuel Beckett short works, including Catastrophe, Rockabye, and Krapp's Last Tape. Starting April 24, Thursdays-Saturdays. Continues through May 3. The Garage, 975 Howard (at Sixth St.), 289-2000.
Teatro ZinZanni: A bewitching evening of European cabaret, cirque arts, theatrical spectacle, and original live music, all blended with a five-course gourmet dinner, set in the nightclub of your dreams, now in its eighth season in San Francisco. Current show is À La Folie, starring Liliane Montevecchi. Wednesdays-Saturdays, 6 p.m., $116-$140, 438-2668, www.zinzanni.org. Pier 29, Embarcadero (at Battery).