If irony is the ethos of our age — and it is — then the hipster is our archetype of ironic living. The hipster haunts every city street and university town. Manifesting a nostalgia for times he never lived himself, this contemporary urban harlequin appropriates outmoded fashions (the mustache, the tiny shorts), mechanisms (fixed-gear bicycles, portable record players) and hobbies (home brewing, playing trombone). He harvests awkwardness and self-consciousness. Before he makes any choice, he has proceeded through several stages of self-scrutiny. The hipster is a scholar of social forms, a student of cool. He studies relentlessly, foraging for what...