When the Columbia Library closed each night at 10, it was the custom of John Spofford Morgan, who was studying for a master’s in international affairs, to hop on the subway and head downtown to the New Verdi on West 72nd. Back then, there were two kinds of bars for gay men, he says: pickup joints and old-friends joints. The New Verdi was the latter, but it turned into the former when at around 10:30 on May 17, 1947, Louis Halsey walked in. “Love at first sight,” says Lou now. “Was it?” John wonders.