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Bike to work day Various SF locations. www.sfbike.org . 5:30am-7pm, free. Trade in a cramped morning Muni commute for an open-air bike ride today in honor of bike to work day. The SF Bicycle Coalition knows biking the hills of SF is not always an easy task, which is why it has set up 26 "energizer stations" all around the city to serve free snacks, beverages, and reusable, goodie-filled tote bags to use on your to-and-froms. Check the Coalition's site to find a station along your regular route.
Thirsty Thursday Toga Party Atmosphere, 447 Broadway, SF. www.a3atmosphere.com . 9:30pm, free. RSVP required. Revive your Animal House-esque days with a toga party. Travelers, locals, au pairs, and international students will be decked out in the finest bed sheets around. Show up before 10pm and score a free bingo card with a $3 shot offered every time you check off a square.
Britweek Design Series San Francisco Design Center, 2 Henry Adams, SF. www.babcsf.org . 4:30-10pm, $20-25 advance. The British-American Business Council hosts this design-driven evening. The event will kick off with a panel of British and American architects and interior designers, followed by a second international panel of innovators working in product design and technology, finishing up with an after party at Project One Gallery, just down the street from the design center.
Spirit: A Century of Queer Asian Activism Mission Cultural Center, 2868 Mission, SF. www.queerrebels.com . 8pm, $12-20. Queer Rebels' organization for queer artists of color brings movers and shakers of the community together to celebrate 100 years of queer Asian activism. The two-day event begins tonight with performances by Eli-Coppola award winning poet Ryka Aoki, performance artist Genevieve Erin O'Brien, and more. The festivities will continue tomorrow night with a panel discussion and film screenings.
Pet Week kick-off Little Marina Green, Marina and Baker, SF. www.marinatimes.com . 11am-3pm, free. Soak up some sun and get your puppy fix today at Pet Week's kick-off event. Bring your favorite four-legged friend for free microchipping, watch police K-9s show off their detective skills, pick up some free goodies for Fido, and maybe even adopt a new friend. Pet adoption will be available from eight organizations including Pets Unlimited, Muttville, and Rocket Dog Rescue.
Bluegrass Pickin' Picnic Dahlia Picnic Area, Golden Gate Park, SF. www.countryroundupsf.com . Noon-6pm, free. If you're a fan of Golden Gate Park and bluegrass but the giant mobs of the Hardly Strictly festival bruise your gentle nerves, here is your second chance. Sponsored by the California Bluegrass Association, this afternoon is an open jam session for all who play or just like listening to bluegrass. Set up your picnic blanket early and score some free hamburgers and hot dogs while supplies last.
Wanderlust Festival Marina Green. sf.wanderlustfestival.com. 12-5pm, free. Register online. If the daily grind of city life is taking its toll, head over to the Marina for a stress-relieving day of yoga and music. The day will begin with yoga sessions led by Pradeep Teotia and Susan Hauser, Lululemon 2012 ambassador. The evening will conclude with musical performances by DJ Drez and the fittingly named MC Yogi.
Cakespy book signing Book Passage, 1 Ferry Building, SF. www.bookpassage.com . 6pm, free. Ever been stuffing your face with a red velvet cupcake or Girl Scout cookie and wondered where the recipe originated? Self proclaimed "dessert detective" Jessie Oleson Moore has these answers and more in her new book The Secret Lives of Baked Goods: Sweet Stories & Recipes from America's Favorite Desserts. Head over to the Ferry Building to meet Moore and get a signed copy of this sweet literary treat.
"Ask a Scientist: Origins of the Universe" SoMa StrEat Food Park, 428 11th St., SF. www.askascientistsf.com . In this lecture hosted by UC Berkeley Professor Eliot Quataert science fanatics will learn how the universe evolved from its smooth beginnings to its current state. Quataert will focus on how gravity reigns supreme and builds up the planets, stars, and galaxies required for biological evolution. If digesting all this scientific chatter works up an appetite, fuel up at one of the ten gourmet food trucks at SoMa StrEat Food Park.
Secret San Francisco: Adventures in History Balboa Theatre, 3630 Balboa, SF. www.cinemasf.com/balboa . 6:30pm, $10. The history of the downtown neighborhoods of San Francisco are well photographed and documented, but head further west and things tend to get a bit foggy. That's where the Western Neighborhood Projects comes in. The nonprofit has been documenting all things west of Stanyan Street since 1999. Head to the Balboa Theatre tonight for a dose of SF history west and east short films, archival TV footage, and other historic surprises.