We've already told you all you need to know about tomorrow's Street Food Festival. Here's other stuff that might be less crowded.

1st Annual Bonehead Barbeque: 107.7 The Bone presents the legendary Cheap Trick, along with Stone Temple Pilots and openers, rocking out at Fort Mason on Saturday. Chow down on Southern and Texas style barbeque, Argentine and Californian grilled meats, and barbequed West Coast oysters, along with many beer and other drink selections. Yum! Get cheap(er) tickets over at FunCheapSF!

Atheist Film Festival: These folks had us with their brilliant tagline: "A film festival you can believe in." Happening on Sunday, the festival provides a safe haven for atheists to let their hair down, promising a "stellar lineup of fun films for happy heretics: new and classic feature films, documentaries and shorts ranging from the blasphemous to the sublime."

San Francisco Opera at Stern Grove: Say goodbye to summer on Sunday at the Stern Grove Festival's final show of the season, featuring internationally acclaimed mezzo-soprano Dolora Zajick with Susannah Biller, Leah Crocetto, Sara Gartland, Nadine Sierra, Maya Lahyani, Brian Jagde, Ao Li, and Ryan Kuster and The San Francisco Opera Orchestra conducted by Giuseppe Finzi.

Alamo Square Flea Market: Go see the infamous Full House house and shop for cute handmade and second-hand items at Alamo Square on Saturday. This year's event features a kids play area and Off the Grid food trucks (of course).

Free Yoga at Civic Center: FunCheapSF has the scoop on a couple of free outdoor yoga classes taught by Iyengar yoga instructor Tony Eason this Sunday and next. Bring your own mat and a bag lunch to eat after the lesson.