When Giorgio Zocco (a/k/a Sal the Barber) died last year, it was feared that his Sal's Barbershop, a Carroll Gardens institution for more than three decades, would be lost forever. Enter television producer Steve Marks, who fell in love with all the old-school charm (such as the shop's classic red chairs, striped barber's pole, and—the pièce de résistance—a mural of a tropical coastline). With the blessings of the Zocco family, Marks kept most of it intact, lending a retro feel to his barbershop, Persons of Interest. Grab a complimentary Brooklyn Lager and have a seat in one of those red chairs to get a first-rate cut from one of the shop's stylish barbers. Although Sal's nice price of $20 for a haircut is gone, the cost is still reasonable: Haircuts are now $40, or treat yourself right and get the Combo Platter: a shave and a haircut for $75. 299 Smith Street, Brooklyn, 718-858-5300, personsofinterestbklyn.com (11231)