Natty Carroll Gardens barbershop Persons of Interest is opening a second location, in Williamsburg, this Thursday (84 Havemeyer St., nr. Metropolitan Ave., Williamsburg; 718-218-9100), shirking the “cloyingly retro” look, as owner Steve Marks puts it, in favor of décor inspired by sixties-era U.N.-secretariat buildings, with luan paneling, navy leather, and chrome barber chairs. (“No one’s going to be wearing suspenders and twirling his mustache,” he clarifies.) The seven-chair shop aims to avoid other typical salon airs: Walk-ins are accepted, prices are not unreasonable ($42 for a cut or shave, $22 for a cleanup), bottles of Brooklyn Lager are self-serve, and you’re as likely to hear Woody Allen stand-up on the iPod as Joy Division. As for the cuts, the so-called G-man—shorter on the sides, longer on top—is a common request.