all day: Festival

More than 30 North American tribes will be represented at the 11th annual Lake Casitas Intertribal Pow Wow. The two-day event will feature traditional dances, drumming and music plus more than 50 booths offering authentic pottery, jewelry and fine art.

* Lake Casitas Intertribal Pow Wow, Lake Casitas Recreation Area, 11311 Santa Ana Road, Ojai, Saturday and Sunday, 10 a.m. to 6 p.m. $5 to $8; children under 5 are free. (805) 649-2233.

8:30 pm Theater

El Vez, the “Mexican Elvis” (alter ego of performer Robert Lopez), presents his first theatrical work, “El Vez: Around the World in 80 Minutes, or Less,” a madcap musical travelogue through Las Vegas and beyond.

* “El Vez: Around the World in 80 Minutes, or Less,” Highways, 1651 18th St., Santa Monica, Friday through Sunday at 8:30 p.m. $15. Also Saturday, 10:30 p.m. to 3 a.m.: Post-show, “Around the World-O-Rama” party. Show and party, $20; party only, $10. (310) 315-1459.

7:30 pm: Pop Music

A year after her remarkable debut album, lots of people know who Jill Scott is. The Philadelphia singer-songwriter wowed critics and fans alike with her album, “Who Is Jill Scott? Words and Sounds Vol. 1,” and with her shows at the House of Blues and Universal Amphitheatre in the winter. Now it’s summer and time to enjoy her groovy-funky-sexy-neo-soul singing in the nice summer outdoor setting of the Greek Theatre. Special guests Eric Benet and Mike Phillips join her.

* Jill Scott at the Greek Theatre, 2700 Vermont Canyon Blvd., Griffith Park, L.A. , 7:30 p.m. $25 to $67.50.

8 pm: Theater

From “Forever Plaid” creator Stuart Ross and Mark Hampton comes “The Boswell Sisters,” a world premiere musical about the groundbreaking 1930s close-harmony sister act that would be a major influence on vocal groups to come.

* “The Boswell Sisters,” Globe Theatres’ Old Globe Theatre in Balboa Park, San Diego, Saturday, 8 p.m. Regular schedule: Tuesdays to Saturdays, 8 p.m.; Sundays, 7 p.m.; Saturdays and Sundays, 2 p.m. Ends Sept. 1. $25 to $50. (619) 239-2255.

7:30 pm: Benefit

Dust off those platform shoes and practice curling that Farrah Fawcett hair. The annual AIDS Project Los Angeles Summer Party has adopted a ‘70s theme, and those who dress as one of Charlie’s Angels get in free. Don’t worry, if you don’t pay the $75 admission ($65 in advance) there are still lots of opportunities to drop some cash at this fund-raiser, including a casino and a silent auction. There will also be food from 75 L.A. restaurants, a comedy stage and three dance floors--Latin music, disco and country.

* AIDS Project Los Angeles Summer Party, on the Universal Studios back lot, Universal City, 7:30 p.m. $75 at the door. $65 in advance. Two-for-one ticket sale Friday, 6 to 9 p.m. at the Abbey, 692 N. Robertson Blvd., West Hollywood. VIP tickets $150; reception at 6:30 p.m. (213) 201-1583.

9 pm: Pop Music

Add N to [X]’s name refers to a computer command that creates a third electronic force, one clue to the London-bred trio’s provocative mix of machine and music. The synthetic and the organic clash bracingly on the current album “Add Insult to Injury,” and the group is known for the intensity of its live shows.

* Add N to [X], with Starflyer 59 and the Raymakers, Spaceland, 1717 Silver Lake Blvd., L.A., 9 p.m. $12. (213) 833-2843.

8 pm: Theater

Ellen Geer plays the title role in Robinson Jeffers’ adaptation of “Medea,” the dark Greek tragedy by Euripides about the violent vengeance of a betrayed and dispossessed wife.

* “Medea,” Will Geer Theatricum Botanicum, 1419 N. Topanga Canyon Road, Topanga, Saturday, 8 p.m. Regular schedule: Saturdays at 8 p.m. through Aug. 18. Also Aug. 5 to Sept. 9: Sundays at 7:30 p.m. Sept. 15 to 29: Saturdays at 8 p.m. Oct. 7 to 21: Sundays at 3 p.m. Ends Oct. 21. $14 to $20. (310) 455-3723.

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Freebie

* The San Fernando Valley Hongwanji Buddhist Temple holds its 50th annual Obon Festival, featuring exhibits, dancing, food, games and tea ceremony, at the San Fernando Valley Japanese-American Community Center, 12953 Branford St., Pacoima. Saturday, 4 to 10 p.m., and Sunday, 4 to 9 p.m. (818) 899-4030.