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.
"Somebody to Love: My Musical Tribute To Freddie Mercury": Cabaret dedicated to Freddie Mercury and Queen. Fri., May 20, 10 p.m.; Sun., May 22, 8 p.m. $20. The Rrazz Room, at the Hotel Nikko, 222 Mason (at Ellis), 394-1189.
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.
Wretch Like Me: Solo performance by David Templeton on his Christian upbringing and his eventual rejection of it. Through May 22. $6-$10. Roxie Theater, 3117 16th St. (at Valencia), 863-1087.
Your F!#&ed Up Relationship: Improv based on real-life relationship problems supplied by audience members. Fridays. free. Alcove Theater, 414 Mason (at Derby).