Happening Saturday

MUSIC

The Open Borders Festival This fest takes its title literally (it’s housed in a former Borders bookstore) and figuratively (it breaks down genre barriers). Artists as varied as Doors keyboardist Ray Manzarek, avant-rapper Murs, stoner-rock titans Entrance Band and country-cute combo He’s My Brother She’s My Sister play. Borders Books & Music, 125 W. Thousand Oaks Blvd., Thousand Oaks. Sat.-July 30, various times. (805) 497-1018.

KROQ Weenie Roast A cavalcade of alt-rock giants converges for the KROQ Weenie Roast. Catch nonstop musical entertainment from Linkin Park, Rise Against, the Strokes, the Airborne Toxic Event, Bad Religion and more, with proceeds benefiting Music for Relief, Heal the Bay and the Surfrider Foundation. Verizon Wireless Amphitheater, 8808 Irvine Center Drive, Irvine. 1-10 p.m. $45-$75. kroq.radio.com.

MOVIES

The Vampire-Con Film Festival On tap for Saturday is the Blacula franchise — “Blacula” (1972) and “Scream, Blacula, Scream!” (1973). Don’t forget to dress in your vampire finest for the festival’s costume contest. New Beverly Cinema, 7165 W. Beverly Blvd., L.A. 7:30 and 9:30 p.m. $7. (323) 938-4038. https://www.newbevcinema.com, https://www.vampire-con.com.

EVENTS

Cairo Caravan 2011 With flowing veils and plenty of spangles, thousands of belly dancers meet at the Queen Mary for three days of dancing, shopping, drumming and workshops at Cairo Caravan 2011. Free seminars and films are offered, plus an Under the Sea Masquerade Ball. Queen Mary, 1126 Queen’s Highway, Long Beach. Sat.-Sun. Check website for prices. (562) 435-3511. https://www.mecda.org.

Green City Fair The actor and environmental activist Ed Begley Jr. will be in attendance to help kick off the TreePeople’s inaugural Green City Fair. The event features a program of workshops on such topics as gray-water systems, sustainable living for apartment dwellers and eco-friendly cooking, as well as live music, vendors, exhibitors, food and crafts. TreePeople, 12601 Mulholland Drive, Beverly Hills. 10 a.m.-4 p.m. Free. (818) 753-4600. https://www.treepeople.org.

STAGE

trembler.SHIFTER REDCAT presents the world premiere of Los Angeles-based choreographer Meg Wolfe’s new work, “trembler.SHIFTER,” which pairs Wolfe’s signature full-out dancing with sound artist Aaron Drake’s destabilizing sonic environment. REDCAT, 631 W. 2nd St., L.A. 8:30 p.m. Sat., 3 p.m. Sun. $20 and $25. https://www.redcat.org.