Dining with the stars…Bobby Flay ate alone at the bar at the new Osteria Salina in (95 School Street, Bridgehampton) on Saturday night noshing on the crudo of striped bass, grilled octopus and pesce spada. He enjoyed it so much he came back two more times over the weekend. On Sunday, artist Peter Marcelle had dinner there after his Bridgehampton gallery opening. Sunday night, Jeff Mangole, New York Jets football player, was spotted hanging with his family at Rowdy Hall on Main Street in East Hampton, eating a Rowdy Burger and enjoying a beer. Nick & Toni’s on North Main Street in East Hampton was busy over the holiday weekend. Friday night the piano man Billy Joel sat on the porch with his current squeeze. On Saturday night model Christy Turlington had a girls night out with three girlfriends.