@ SF Public Library Park Branch, 1833 Page Street. An exhibit of then and now photos providing a walk down memory lane of the Haight-Ashbury scene from 1967. Through December 7. sfpl.org

@ San Fransisco City Hall, 1 Dr. Carlton Goodlett Place, Rm 284. Supervisor Rafael Mandelman welcomes artist Jun Yang whose art is currently on display. 4-5pm. mandelmanstaff@sfgov.org

@ The Commonwealth Club, 110 The Embarcadero. The author will discuss his new biography of da Vinci and explain how humanism can inspire scientific achievement and how da Vinci’s varied interests intersect in a larger project. 12-1pm. commonwealthclub.org

@ Noe & Market Streets. On-going outdoor market in the Castro featuring fresh and organic foods from local vendors. 4pm-8pm, every Wednesday through Nov. 4-8pm. pcfma.org 

@ Slack HQ, 155 5th Street. Mingle during the happy hour with lightning talks by top ladies at Slack on a range of topics from navigating career transitions and managing teams to finding mentors and creating inclusive workspaces. 6-8pm. hiretechladies.com 

@ SF LGBT Center, 1800 Market Street. Legal expert Deb Kinney, Esq., will lead a workshop designed to help create a plan tailored to your own life and priorities. 6-7:30pm. hospicebythebay.org

@ Marsh Theater, 1062 Valencia Street at 22nd Street, San Francisco from 7:00 pm to 9:00 pm. RSVP not required --free event, limited space. Happening October 25, 2017 and November 3, 2017. Women and men who crave intelligent conversation and stimulating ideas, claim your seats!