CALENDAR WEKEND

Musical

The musical “Little Shop of Horrors” opens tonight at the Madrid Theatre in Canoga Park. Based on the 1960 classic low-budget film by Roger Corman, the musical first opened off-Broadway in 1982 with a score by Howard Ashman and Alan Menken. A film version of the musical dark comedy, starring Rick Moranis, Ellen Greene and Steve Martin and featuring the voice of Levi Stubbs as Audrey II, was released in 1986.

* “Little Shop of Horrors” opens tonight( at 8, Madrid Theatre, 21622 Sherman Way, Canoga Park. Regular schedule: Friday-Saturday, 8 p.m., and a matinee Jan. 29, 2 p.m. $16-$21. (818) 340-0221.

Parody

El Vez, the Mexican incarnation of the King, performs Saturday night in Palmdale. El Vez, whose real name is Robert Lopez, puts on a show that has been described as half tribute, half parody. With his Elvettes--Priscillita and Lisa Marie--he performs in a variety of musical styles, with social commentary and humor mixed in.

* El Vez and the Memphis Mariachis, Saturday, 8 p.m., Palmdale Playhouse, 38334 10th St. East. $8-$10. (661) 267-2787.

Orchestra

The Los Angeles Chamber Orchestra will continue its “Made in California” season Saturday night in Glendale with the guest appearance of California pianist Christopher O’Riley. The young pianist has won top prizes in the Van Cliburn, Leeds, Busoni and Montreal competitions. He has performed around the world, including engagements at Lincoln Center in Manhattan and the Kennedy Center in Washington, D.C. O’Riley will play Chopin’s Piano Concerto No. 2 in F minor. The program will also include works by Stravinsky and Richard Strauss.

* The Los Angeles Chamber Orchestra, Saturday, 8 p.m. Alex Theatre, 216 N. Brand Blvd., Glendale. $13-$50. (213) 622-7001, Ext. 215.

Comedy

Comic Stanley Myron Handelman will make a rare local nightclub appearance Saturday at Monteleone’s West in Tarzana. Handelman burst upon the national consciousness in 1968 as a featured performer on “Dean Martin Show,” a summer replacement series that also featured Charles Nelson Reilly, Paul Lynde, Albert Brooks and Marty Feldman. Pianist Dave Mackay and Interplay also will perform.

* Stanley Myron Handelman, Dave Mackay and Interplay, Saturday, 8 p.m., Monteleone’s West, 19337 Ventura Blvd., Tarzana, (818) 996-0662.