Pale, nervous girls with black-rimmed glasses and blunt-cut hair lolled around on sofas, riffling Penguin Classics provocatively. [...] But it wasn’t just intellectual experiences—they were peddling emotional ones, too. For fifty bucks, I learned, you could “relate without getting close.” For a hundred, a girl would lend you her Bartok records, have dinner, and then let you watch while she had an anxiety attack.