For much of the twentieth century, the New York Jewish deli was an iconic institution in both Jewish and American life. As a social space it rivaled - and in some ways surpassed - the synagogue as the primary gathering place for the Jewish community. In popular culture it has been the setting for classics like When Harry Met Sally. And today, after a long period languishing in the trenches of the hopelessly old-fashioned, it is experiencing a nostalgic resurgence.