MIKE KOOZMIN/THE S.F. EXAMINERActivists protest sweatshops in front of an H&M store in the Financial District on Wednesday. The protesters

MIKE KOOZMIN/THE S.F. EXAMINERActivists protest sweatshops in front of an H&M store in the Financial District on Wednesday. The protesters

Sept. 21: Dueling lessons, dance music and more

New book

JUICE: Recipes for Juicing, Cleansing & Living Well By Carly de Castro, Hedi Gores and Hayden Slater ($18.99) The founders of Pressed Juicery are appearing at Book Passage today to discuss their new book, a DIY guide to juicing. [1 p.m., 1 Ferry Building Plaza, S.F.]

Volunteer

Lava Mae: The Lava Mae mobile hygiene truck, which provides homeless people with shower facilities, is seeking volunteers. [www.lavamae.org]

Get outside

Pistol duel: Learn the basics of pistol dueling — no live firearms, please — near the site of the 1859 Broderick-Terry duel, in which hot-tempered Judge David Terry fatally shot U.S. Sen. David Broderick. Terry was shot dead a few decades later by a fellow judge's bodyguard (long story). [10:30 a.m., Broderick-Terry Duel Landmark Park, 50 El Portal Way, Daly City]

Tour de Coop: The self-guided bike tour visits Silicon Valley's urban homesteads, including chicken coops, bee hives, gardens and more. [9 a.m.-4 p.m., various locations; http://tourdecoop.org]

Irish music: The Golden Gate Park Band is marking Robert Emmet Day, which honors the Irish nationalist and rebel leader, with Irish music and dancing. [1 p.m., Music Concourse, Golden Gate Park, S.F.]

Lung run: The sixth annual Your Next Step is the Cure 5K benefits lung cancer research. [1 p.m., Lake Merced and Sunset boulevards, S.F.]

Music

Beyond Wonderland: The Beyond Wonderland electronic dance festival includes music, art and more. [1 p.m., Shoreline Amphitheatre, 1 Amphitheatre Parkway, Mountain View]

Musical tour: Pop singer-songwriter-producer Yalls is appearing on the AudioBoat, a sound-art voyage that performs live scores to passing Bay scenery. [6 p.m., Pier 43½, S.F.;www.soundwavesf.com/6/sep-21-2]

Benefit concert: Walrus, Hot Lunch, Brubaker and more are playing a benefit show for musician-actor Garth Petal, who was recently diagnosed with stage-4 cancer. [7 p.m., Bottom of the Hill, 1233 17th St., S.F.]

Film

Chaplin films: Charlie Chaplin shorts, including “Easy Street,” are screening in a Roxie Kids program, with all kids under 12 admitted free. [2 p.m., Roxie Theater, 3117 16th St., S.F.]

Classes

Dance sampler: Alonzo King Lines Ballet is offering a sampler of its dance classes, from beginner to intermediate. For $5, visitors can try Bollywood dancing, ballet, tango and more. [1-5 p.m., 26 Seventh St., S.F.]

Jam session: The Community Music Center is holding an open house and jam session, including a sample music class for children and other activities. [3-5 p.m., 544 Capp St., S.F.]

Brunch

Treasure Island Bar & Grill: For brunch, it's time to hit the island — Treasure Island, that is. Pair a bottomless mimosa with brunch favorites as well as unconventional breakfast fare such as shrimp tacos, BLTs and crabcake sandwiches. [11 a.m.-3 p.m., 60 Clipper Cove Way, Treasure Island, S.F.; (415) 627-9060]

arts

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