Is Astoria becoming the next Hell’s Kitchen? In the last year, three L.G.B.T. nightspots have popped up in this diversifying neighborhood of Queens, the latest being Icon. Opened in January by a longtime Astoria resident, Nick Lion, Icon occupies a former Greek bar that has been given a makeover, with Swarovski-bedazzled lamps, studded black banquettes and swirly wall accents. One thing missing are big TV screens. “I don’t want a Britney Spears video to be the star,” he said. “I want the crowd to be the main attraction.”