 In 1958 he moved to New York City, where he formed friendships with jazz musicians such as Charlie Haden and Ornette Coleman while a regular at the jazz clubs "The Five Spot" and "Slugs".He also formed friendships with writers Allen Ginsberg and LeRoi Jones in addition to fellow artists Lester Johnson, Red Grooms, Mimi Gross, Marcia Marcus and Allan Kaprow, with whom he participated in some of the earliest Happenings.In 1960, he had his first solo exhibition at the Delancy Street Museum and later at the Martha Jackson Gallery where he had solo exhibitions in 1963–64, and 1965.