Gypsy Bar was overrun the other night with stars from shows owned by NBCUniversal. Think we’re kidding? In town as part of the cable conference were: Melissa Gorga, Caroline Manzo, and Kathy Wakile from “The Real Housewives of New Jersey,” Bruce and Kris Jenner and Khloé Kardashian Odom from “Keeping Up With the Kardashians,” “Hardball” host Chris Matthews, Eva Marcille of “Girlfriend Confidential: LA,” Jeannie Mai from “How Do I Look!”, Sam Huntington of “Being Human,” and “White Collar” actor Willie Garson. . . . Gym Class Heroes, whose frontman Travie McCoy famously dated Katy Perry before her short-lived marriage to Russell Brand, put on a private show for an audience of MTV execs at Woodward at the Ames Hotel this week. . . . Also staying at the Ames was Dutch DJ Armin van Buuren, who was in town to spin at Royale . . . ESPN president John Skipper dined at Strega Waterfront the other night. . . . And John Stamos had lunch Wednesday at Legal Sea Foods in the Pru.