SEEN ON THE SCENE: “That ‘70s Show” alum and DJ Danny Masterson was spotted getting a late-night ramen fix at Ramen-san earlier this week — joined by TV host and sports commentator Sal Masekela. … The powerhouse Gibsons Restaurant Group’s hugely-successful biz continues to grow, much to the delight of Steve Lombardo, John Colletti and their partners. The company has been hired to run the new Boathouse restaurant in Disney Common at Disney World in Orlando — slated to open next March. Before that, a mid-November launch is expected for what likely will be called the Polo Lounge at Ralph Lauren’s new flagship store on New York’s famed Fifth Avenue. To get things off the ground, Gibsons Group’s popular Rich Varnes — general manager of their RL eateary here — will be in New York for the rest of the year to get that new RL-esque restaurant off the ground. … Word has it, Celeste in River North — which just opened it’s new rooftop — will next unveil a new private, third-floor lounge in time for Lollapalooza weekend, featuring after-party DJ sets led by Ethan Kath of Crystal Castles, Jono Ma of Jagwar Ma and Holy Ghost!