A 40+ year visual romp through San Francisco’s gay sexual underground with San Francisco gay radical sex photographer Mark I. Chester. From the late 1970s until the present, Mark has documented his life in South of Market. Those images provide a dark explicit diary of those people during those tumultuous times. Mark’s current work has been to return to the streets where he started and photograph men having sex on the streets of South of Market at night. This work is both a love letter to the past and a dream of the future. Mark will have copies of his books for sale.