In the fall of 1964, on a visit to the World’s Fair, in Queens, Lewis Altfest, a twenty-five-year-old accountant, came upon an open-air display called the Parker Pen Pavilion, where a giant computer clicked and whirred at the job of selecting foreign pen pals for curious pavilion visitors. Within a year, more than five thousand subscribers had signed on. It would invite dozens of matched couples to singles parties, knowing that people might be more comfortable in a group setting. They wound up in the pages of the New York subscriber.