Suppose a friend invites you to a concert on Friday night—but instead of pulling two tickets to Fun. out of his pocket, he brandishes a set of passes to a classical music concert. Not that you don’t appreciate classical music, but Lincoln Center wasn’t exactly where you had anticipated spending your precious weekend night. You go to the concert, because you said you would, and you have an amazing time. But you can’t help thinking about your friends who are out bumping along to dance music at The Heights.