Best Bets: Sat 10/17

7:30 p.m.: Pop Music

Every Saturday night, starting this week, the Country Club in Reseda will present Mariachi USA Fiesta, a supper club for mariachi lovers. Performers include Mariachi Imperial de Mexico and soloists from the annual Mariachi USA Festival at the Hollywood Bowl.

* Mariachi USA Fiesta at the Country Club, 18419 Sherman Way, Reseda. Saturdays, 7:30 p.m. $35-$50, including dinner. Cash bar. (800) 627-4224.

All day: Antiquing

Finally, an antique show without any of those stuffy Victorians. The Modern Times 20th Century Design Show and Sale has 75 vendors hawking everything from Bakelite plastic jewelry to 1920s appliances. Art Deco, Streamline, Moderne and Arts and Crafts furnishings and art also will be available.

* Modern Times 20th Century Design Show and Sale, Glendale Civic Auditorium, 1401 N. Verdugo Road. Saturday, 11 a.m.-6 p.m.; Sunday, 11 a.m.-4 p.m. $5. (310) 455-2894.

7:30 & 10 p.m.: Theater

Shakespeare’s ghosts, witches and spirits come to life in Shakespeare Festival/LA’s “Hauntings, a Shakespearean Seance,” conjuring spirits from such plays as Macbeth, Hamlet and Richard III. It’s staged by noted Broadway director Tom O’Horgan (“Hair,” “Jesus Christ Superstar,” “Lenny”), with lighting design by six-time Tony Award-winning Jules Fisher and starring internationally acclaimed magician Eugene Burger as the Spirit Guide.

* “Hauntings, a Shakespearean Seance,” Pacific Design Center, Center Green Theatre, 8687 Melrose Ave., Los Angeles. Thursdays-Sundays, 7:30 and 10 p.m.; Halloween seance, Oct. 31, midnight. Ends Oct. 31. $15-$20. (213) 489-4127.

8 am: Fund-Raiser

Take-a-Hike for Breast Cancer Research’s annual benefit at Paramount Ranch will be led by model Cindy Crawford. Honorary Chairwoman Crawford and other celebrities, including actresses Tia and Tamera Mowry, will host the event. People at all levels of fitness are invited to join the hikes ranging from less than a mile for beginners to six miles for advanced hikers.

* Take-a-Hike for Breast Cancer Research, Cornell Road off Mulholland Drive, Paramount Ranch, Malibu. Registration: 8 a.m. Hikes start at 9:30 a.m. Beginners, intermediate, advanced hikers. Limited number of free mammograms. Information booths on exercise, breast cancer prevention, nutrition. $23 for VonsClub members; $30 day of hike. (213) 486-4558.

8 pm: Music

Music Directors Jorge Mester and JoAnn Falletta, longtime leaders of the Pasadena and Long Beach symphonies, respectively, launch their newest seasons with difficult and showy programs. At Pasadena Civic Auditorium, Mester leads a program of music by the late Leonard Bernstein; his soloist is violinist Robert McDuffie, who will play the Serenade (after Plato’s “Symposium”). At the Terrace Theater in Long Beach, Falletta hosts Horacio Gutierrez, who plays the Piano Concerto by Andre Previn; the program also offers works by Hindemith and Richard Strauss.

* The Pasadena Symphony plays in Pasadena Civic Auditorium, 300 E. Green St. $3-$60. (626) 584-8833.

* The Long Beach Symphony plays in Terrace Theater, 300 E. Ocean Blvd., Long Beach. $11-$50. (562) 436-3203.

3 & 7:30 pm: Concert

Who needs instruments? The World Acappellafest promises eight vocal groups, including witty foursome the Bobs, the ultra-slick Nylons and beat-minded Rockapella, in a pair of concerts that features swing, jazz, doo-wop and other harmonious delights guaranteed to make you sing.

* World Acappellafest, John Anson Ford Amphitheatre, 2580 Cahuenga Blvd. E., Hollywood. $15-$200. (877) 222-7352.

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Freebie: KTLA Kids Day L.A., near the merry-go-round at Griffith Park, 10 a.m.-4 p.m. (213) 485-1406.