By the mid-1950s Tristano focused his energies more on music education. In 1956 he had to leave his Manhattan studio; he established a new one in Hollis, Queens. Some of his core students moved to California after Tristano's base was relocated. This, coupled with a separation from his wife in the same year due to his infidelity, meant that he was physically more isolated from the New York music scene. He gave fewer concerts than earlier, but in 1958 he had the first of what were sometimes lengthy engagements at New York's Half Note Club, after the owners persuaded him to perform, in part by replacing their club's Steinway piano with a new Bechstein of Tristano's choosing. They later reported that, in the late 1950s and early 1960s, the musicians who were the most popular at their club were John Coltrane, Zoot Sims, and Tristano: "Coltrane brought in the masses, Zoot brought in the musicians and Lennie brought in the intellectuals." In 1959 Tristano's quintet again performed in Toronto, this time at the Famous Door.