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

@ PianoFight Second Stage, 144 Taylor Street. A play by Dan Giles about two men who are about to have a baby. 5:00 pm happy hour; 7:30 show, repeating through April 29. faultlinetheater.com

@ Feinstein’s, Hotel Nikko, 222 Mason Street. The legendary star who has received The Emmy, The Oscar and The Grammy returns to Feinstein’s for two shows. 8:00 PM repeating on Saturday, April 22. feinsteinsatthenikko.com

@ 22nd Street (Mission to Valencia and Bartlett).  The 45th anniversary event with speakers, hand-on activities and art projects for all ages, eco-fashion shows and more. 10 am – 7 pm. calrecycle.ca.gov/publiced/earthday/

@ SF Main Library, Koret Auditorium, 100 Larkin. Panel discussion about protecting children’s safety and raising them to be proud of their identities and to show up for their friends. 3:30 pm. sfpl.org

@ Harvey Milk Photo Center, 50 Scott Street. An international exhibit on the photography, art and athleticism of skateboarding. 5 pm – 8 pm. Exhibit continues through May 31. harveymilkphotocenter.com