Play it by hear.

GO
Treasure Island Music Festival
What: Two-day music fest features electronica, hip-hop, garage rock, and indie pop with headliners like Goldfrapp and Chester French.
Why: Treasure every minute.
When: Sat. & Sun. See performance schedule.
Where: Treasure Island. See transportation and parking guide. Tickets online at treasureislandfestival.com.

SHOP
Lulu Frost
What: Lisa Salzer’s haute jewelry collection debuts in SF with pieces created from reworked vintage bits.
Why: Chill out.
When: Mon.-Thurs., noon-7 p.m.; Fri. & Sat., noon-8 p.m.; Sun., noon-6 p.m.
Where: BellJar, 3187 16th St., at Guerrero St. (415-626-1749).

Andronico’s
What: Bay Area gourmet grocer reopens its Inner Sunset digs after an extensive renovation.
Why: Food for thought.
When: Daily, 7 a.m.-11 p.m.
Where: 1200 Irving St., at Funston Ave. (415-661-3220).

GRUB
Presidio Social Club Brunch
What: The Presidio resto launches everyone’s favorite meal with mimosas and rum-soaked challah French toast on the outdoor patio.
Why: Pay your dues.
When: Sat. & Sun., 10 a.m.-2 p.m.
Where: 563 Ruger St., The Presidio (415-885-1888).

LAUGH
Lewis Black Live
What: Kooky stand-up comedian brings expletive-infused humor to UC Berkeley.
Why: Back in Black.
When: Sat., 8 p.m.
Where: Zellerbach Hall, Bancroft Way, at Telegraph Ave. (510-642-9988). Tickets online at ticketmaster.com.