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

@ Downtown Oakland locations.  A multi-generational conference and festival with panel discussions, workshops, film screenings and dance parties. wimbayarea.com

@ 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

Novato Theater Company Playhouse, 5420 Nave Drive, Novato. The musical about a single man unable to fully commit to a steady relationship. novatotheatercompany.org

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

@ GLBT History Museum, 4127 18th Street. Curator Joey Cain’s exhibition highlighting the roles of four queers in the 1967 Summer of Love: poet Allen Ginsberg, filmmaker Kenneth Anger, philosopher Gavin Arthur and singer Janis Joplin. glbthistory.org

@ Strut Second Floor, 470 Castro Street.