BEST BETS Saturday 9/2

7pm Jazz

A rare Los Angeles appearance by legendary bandleader, trombonist and singer Willie Colon is arguably the highlight of this year’s Latin Jazz Festival, to be held at the Greek Theatre. Through his collaborations with singers Hector Lavoe and Ruben Blades, as well as a slew of solo albums, Colon helped create the now classic salsa sound of the ‘70s, combining the grit of Afro-Cuban rhythms with the swing of American big-band jazz. Also present: Latin jazz architect Chico O’Farrill, veteran pianist McCoy Tyner, Cuban jazzman Boby Carcasses and Puerto Rican group Son Boricua.

* Fourth Annual Latin Jazz Festival at the Greek Theatre, 2700 Vermont Canyon Road, Los Angeles. 7 p.m. $30 to $70. (323) 480-3232.

10am

Pop Music

Ozzy Osbourne presides over Ozzfest, of course, and there are some other veterans, such as Pantera, on the all-day bill. But the bulk of the blitz comes from a new generation of hard-rock warriors--many of them Southern California-bred, including Queens of the Stone Age, Static-X and Incubus.

* Ozzfest 2000, Glen Helen Blockbuster Pavilion, 2575 Glen Helen Parkway, Devore. 10 a.m. $22.25 to $65.25. (909) 886-8742.

11am

Pop Music

The blues don’t get much more red-hot than they do on “Lone Star Shootout,� and the three guitarslingers who made that album--Long John Hunter, Lonnie Brooks and Phillip Walker--are one of the attractions on the first day of the 21st annual Long Beach Blues Festival, whose definition of the blues is liberal enough to admit such acts as Bo Diddley (Saturday), Bobby Womack (Sunday) and the Allman Brothers (Monday).

* Long Beach Blues Festival, Saturday through Monday at Cal State Long Beach Athletic Field, 11 a.m. $27 in advance, $30 at gate, $70 for three-day pass. (562) 985-1686.

4pm

Theater

Wear walking shoes, slather on the sunscreen and follow the action as Foliage Theater Project presents its annual outdoor summer classic on the grounds of the L.A. County Museum of Art and George C. Page Museum. This year’s play is “Lysistrata,� the Aristophanes comedy about sex, war and peace as women from the warring factions “just say no� to their men to make the fighting stop. Gilbert Seldes’ translation is described as appropriate for family audiences. There are post-show theater workshops for ages 8 to 18, too.

* “Lysistrata,� Foliage Theater Project, Hancock Park, grounds of the L.A. County Museum of Art and George C. Page Museum at La Brea Tar Pits. Begins near the Dorothy Collins Brown Amphitheatre, Saturdays and Sundays, 4 p.m. Ends Oct. 8. Free. (310) 284-7974.

5pm

Pop Music

Some of the biggest names in dance music--including Paul Oakenfold, Rabbit in the Moon, Alex Paterson and Groove Armada--head to the desert for the 13-hour mega-rave known as Nocturnal Wonderland. The site of last year’s Coachella Festival will be transformed into an elaborate environment with nine music areas, accommodating such established and newly minted genres as house, drum-and-bass, jungle, hip-hop, trance, happy hardcore and speed garage.

* Nocturnal Wonderland, Empire Polo Field, 81-800 Ave. 51, Indio. 5 p.m. $25 to $40 ($80 for VIP pass). (310) 288-3436.

8pm

Theater

Stage and screen veteran Michael Shannon (he was Helen Mirren’s lover in “Prime Suspect 3�) performs the premiere of his solo show “JFK on JFK,� an exploration of the mind of John F. Kennedy, from the Oval Office to Moscow and Berlin. Directed by Vickery Turner.

* “JFK on JFK,� Stella Adler Theatre, 6773 Hollywood Blvd. Fridays-Saturdays, 8 p.m.; Sundays, 3 p.m. Ends Oct. 1. $15. (818) 227-9602.

Freebies

“Fotografia, Photographs From the Cuban National Salon Exhibition,� a group show of works by emerging Cuban artists, opens at Fototeka, 1549 Echo Park Ave., Echo Park, with a reception from 7 to 9 p.m. (213) 250-4686.

In “A Huey P. Newton Story,� presented by Grand Performances’ Moonlight & Matinees series, Roger G. Smith portrays the rise and fall of the Black Panther party’s charismatic co-founder at California Plaza, 300-35 S. Grand Ave., downtown Los Angeles, 8 p.m. (213) 687-2159.