Strut, 470 Castro, 1st & 3rd Floor. The oldest public open drawing group in the world celebrates 30 years of drawing the male nude in San Francisco with an exhibit of drawings by current and past participants in the weekly drawing group founded by photographer/artist Mark Chester. markichester.com

San Francisco Museum of Modern Art, 151 Third Street. Presenting for the first time side by side the art of two of the 20th Century’s most extraordinary painters. sfmoma.org

Daily through May 25 @ San Francisco City Hall, 1 Dr. Carlton B. Goodlett Place. SF Arts Commission’s exhibition of work by legendary 60s rock n roll photographer Jim Marshall and a new Market Street Poster Series featuring contemporary perspectives on the Summer of Love. sfgov.org

@ Strut, 2nd Floor, 470 Castro. A segment of the city-wide LitQuake Festival will be held at Strut with a team of contributors from the Foglifter Queer Literacy Journal presenting a celebration featuring performances of works from a new anthology. 7:30pm-9pm. strutsf.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

San Francisco Botanical Garden, 1199 9th Avenue. An exhibit of nature illustrations by Rachel Diaz-Bastin open through April 30. Sfbotanicalgarden.org

@ Omi Gallery, 2323 Broadway, Oakland. A group exhibition demonstrating solidarity among artists who identify with being a Nasty Woman. nastywomenoakland.com

@ John Pence Gallery, 750 Post Street. An annual experiential fundraising event supporting life-changing programs to underserved youth and their communities, sponsored by Challenge Day and Be The Change Movement. challengeday.org

@ UCSF Cole Hall, 513 Parnassus Avenue. Hosted by UCSF LGBT Resource Center and UCSF Diversity Outreach. Lgbt.ucsf.edu

@ Ivy Room, 860 San Pablo Ave, Albany.  Hosted every Wednesday. ivyroom.com