SAN FRANCISCO, CALIFORNIA - MAY 28: View of the dining room of The Mushroom restaurant in San Francisco, Calif., on Saturday, May 28, 2022. (Jose Carlos Fajardo/Bay Area News Group) ...

It’s billed as a free-speech event featuring art, music and activism, with a goal of decriminalizing psychedelic plants and fungi across Michigan, like Ann Arbor did at the city level in 2020.