8 pm: Theater

Tracy Young directs “Four Roses,” inspired by works by Tennessee Williams, in which four women enter the world of Williams’ female characters.

* “Four Roses,” Actors’ Gang El Centro, 6201 Santa Monica Blvd., Hollywood. Thursdays-Sundays, 8 p.m. Ends Aug. 29. $12. (323) 655-TKTS.

11 am: Pop Music

If a fellow concertgoer at OZZFest ’99 asks for help driving a stake, don’t get the wrong idea. He or she is probably just pitching a tent at Camp Ozzy, a new annex at the annual hard-rock blowout. The campground opens Friday, and Saturday’s concert features the final U.S. performance of Black Sabbath, as well as assaults from Rob Zombie, Deftones, Slayer, Primus, Godsmack and System of a Down, plus nine bands on the second stage.

* OZZFest ’99 at Glen Helen Blockbuster Pavilion, 2575 Glen Helen Parkway, Devore. 11 a.m. $22. Camp Ozzy begins Friday at 3 p.m. $25. (909) 886-8742.

3 & 8 pm: Music

Besides pineapple, does Hawaii have a more popular export than Don Ho? Since making a splash at the famed Duke’s in Waikiki in the 1960s, Ho has toured the mainland over and over--including two sold-out tours last year. Ho says he’ll never retire--and it’s a good thing. A whole new generation has turned on to his tunes with the popularity of lounge and exotica music. “Tiny Bubbles,” anyone?

* Don Ho at the Ruth B. Shannon Center for the Performing Arts, Whittier College, 13406 Philadelphia St. Friday, 3 and 8 p.m.; Saturday, 3 and 7 p.m. $40. (562) 907-4203.

8 pm: Dance

Members of the adventuresome UCLA APPEX (Asian Pacific Performance Exchange) group gather in downtown L.A. to perform traditional Burmese drumming, Thai classical dance, Tibetan song and dance, Vietnamese modern dance, a Filipino-Indonesian dance collaboration and a pan-APPEX music ensemble. Launched in 1995, APPEX invites Asian and American artists and writers to work together on interdisciplinary and cross-cultural projects at UCLA. Public performances have been rare, so if you miss this one-night foray into outreach, there’s only a program featuring a different slate of artists on July 29 in the UCLA Dance Building to give you a glimpse of APPEX at its apex.

* APPEX, 8 p.m. at the Watercourt, California Plaza, 350 S. Grand Ave., downtown Los Angeles. Free. (213) 687-2159. Also July 29 at 7:30 p.m. in Theater 200, UCLA Dance Building, Westwood. Free. (310) 206-1335.

8 pm: Music

Carl St.Clair leads the Pacific Symphony in a program of Rimsky-Korsakov’s “Capriccio Espagnol,” Rachmaninoff’s Rhapsody on a Theme of Paganini (with the distinguished Jorge Federico Osorio as piano soloist) and Ravel’s orchestration of Mussorgsky’s “Pictures at an Exhibition,” continuing the orchestra’s outdoor season in Irvine.

* The Pacific Symphony, Irvine Meadows Amphitheatre, 8808 Irvine Center Drive, Irvine. 8 p.m. $14 to $57. (714) 755-5799.

10 am: Fiesta

The Southwest Museum hosts Fiesta Weekend, featuring pottery and painting demonstrations, folklorico dancing and lectures in conjunction with the exhibition “Ancient Trails: Connecting the Gran Chichimeca,” which highlights the similarities in art, architecture and culture from 1000 to 1400 AD within the American Southwest and northern Mexico.

* Fiesta Weekend, Southwest Museum, 234 Museum Drive. Saturday and Sunday, 10 a.m.-5 p.m. $6; $4, students and seniors; $3, ages 6-17; under 6, free. (323) 221-2164.

11 am: Workshop

Safe Moves conducts a children’s “rodeo”--an obstacle course of sidewalks, crosswalks, stoplights, stop signs and railroad crossings. Prizes and safety booklets are available to participants.

* Children’s rodeo, Petersen Automotive Museum, 6060 Wilshire Blvd., L.A. 11 a.m.-2 p.m. Free with museum admission: $7; $5, seniors and students; $3, ages 5-12; under 5, free. (323) 964-6347.

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FREEBIES: Flat Top Tom and his Jump Cats and Captain Cardiac and the Coronaries play swing and rock at Cruise Night on Brand Boulevard in Glendale. 6-10 p.m. (818) 548-6464.

CalArts screens new animation by local students, at KAOS, 4343 Leimert Blvd., L.A. 7 p.m. (661) 255-1050.