9:30 pm: Pop Music

Los Angeles roots-rock mainstay James Intveld, who headlines Jacks Sugar Shack, has been pretty much the property of the area’s club-goers who have caught his charismatic qualities in contexts ranging from sideman (the Blasters, Dwight Yoakam, Rosie Flores et al.) to front-and-center (notably, his show-stopping turns at the annual Elvis Birthday Bash). Now you can take some of it home, in the form of his debut album, “Innerworks.”

* James Intveld at Jacks Sugar Shack, 1707 N. Vine St. $7. (213) 466-7005.

8 pm: Theater

Shakespeare’s sweeping political epic “Julius Caesar” is set in turn-of-the-century Rome in Aquila Theatre Company of London’s notable touring production.

* “Julius Caesar,” Luckman Theatre, Luckman Fine Arts Complex, Cal State Los Angeles, 5151 State University Drive. 8 p.m. $27.50-$32.50. (213) 343-6600; (213) 365-3500.

All day: Art

Inigo Manglano-Ovalle’s gallery installation cum spa experience “The El Nino Effect” invites visitors to float in twin sensory deprivation tanks containing salt water heated to body temperature. (There are changing rooms, complete with showers, soap, shampoo and towels to use before and after tank visits.) The installation is accompanied by a new age soundtrack and video images of a cloud formation over the U.S.-Mexico border that often precedes storms. The project deals with themes of migration and pilgrimage, religion and geopolitics, and public and private space.

* In~igo Manglano-Ovalle’s “The El Nin~o Effect,” Christopher Grimes Gallery, 916 Colorado Ave., Santa Monica. Tuesdays-Saturdays, 10 a.m.-5:30 p.m. Appointments to float in the tanks should be made 24 hours in advance and sessions will last 1 1/2 hours. Ends May 16. Free. (310) 587-3373.

All day: Festival

Chefs will be cooking up citrus-flavored dishes at the Orange Blossom Festival, which will fill the streets of downtown Riverside. The annual two-day event will include music of all sorts including country, zydeco, jazz and blues. Tai the Elephant, a Hollywood veteran of film and television, will help start the fun at the Saturday morning parade.

* Orange Blossom Festival, downtown Riverside, (exit 91 Freeway at 14th Street; exit 60 Freeway at Market Street). Parade (10 a.m.), fireworks, music. Saturday, 10 a.m.-8 p.m. Also Sunday, 10 a.m.-6 p.m. Free. Call (800) 382-8202 for events and schedule.

8 pm: Dance

Last seen locally in a 1996 engagement of “The Harlem Nutcracker,” Donald Byrd/The Group returns for a night of provocative mixed rep in Glendale. Sexual politics dominates “Sentimental Cannibalism” and “Quartet,” both of which come from a full-length 1993 piece called “Bristle” and are danced to music by longtime Byrd collaborator Mio Morales. Finally, “Jazz I” represents the opening section of “JazzTrain,” a full-evening work to music by Max Roach. Byrd has presented a number of controversial works on local stages in past seasons, including “The Minstrel Show” and his radically updated version of “Giselle.”

* Donald Byrd/The Group, Alex Theatre, 216 N. Brand Blvd., Glendale. 8 p.m. $28-$38. (800) 233-3123.

8 pm: Music

The late, multiple Oscar and Grammy winner Henry Mancini enlivened a number of movies and television programs with his music. His hits, including “The Days of Wine and Roses,” “Moon River,” with lyrics by Johnny Mercer, and “The Pink Panther Theme,” are among the most memorable songs written for the screen--both small and large--during the ‘50s, ‘60s and ‘70s. At “Oh Henry!,” Mancini’s music will be performed by the 17-piece Hollywood Hills Orchestra, a 6-year-old organization dedicated to film and TV scores, under the direction of pianist Mac Frampton,

* “Oh Henry! Celebrating the Music of Henry Mancini” with Mac Frampton and the Hollywood Hills Orchestra, Marsee Auditorium, El Camino College, 16007 Crenshaw Blvd., Torrance. $18-$21. (800) 832-2787.

FREEBIE: The International Friendship Festival, Queen Mary Event Park, Long Beach, noon, (805) 963-2415.