COMEDY: Adam Savage (MythBusters), Wil Wheaton (Star Trek: The Next Generation, Stand By Me) and music-comedy duo Paul and Storm (The Internet, Da Vinci's Notebook) honor geeks of all stripes at w00tstock Founder's Night, featuring songs, readings, comedy, demonstrations, short films, and "other clever widgets born from and dedicated to the enthusiasms, obsessions, trials and joys of geek pride." (7:30 p.m., Marines' Memorial Theatre, 609 Sutter Street)

THEATER: Based on the bestselling novel by Cory Doctorow, Little Brother, is a "near-future thriller, a teenage romance, and a frightening predictor of things to come," which follows a 17-year-old hacker who finds himself "in the wrong place at the wrong time during a terrorist attack in San Francisco." (7 p.m., The Custom Made Theatre Company, 1620 Gough Street)

RECORDS: Buy, sell, trade records, while drinking beer and eating tacos from next door at the Knockout's Free Record Swap Day. (If you come across any Kinks or Roxy Music records, please let us know.) (5:30 p.m., The Knockout, 3223 Mission Street)