“Fly United!” screamed Steven Slater on Sunday as he enjoyed guest-of-honor status at Playgirl marketing head and club promoter Daniel Nardicio’s booze cruise birthday party in NYC, where 350 homos treaded water around the island to fete the guy who got Ronnie Kroell to go naked. First Howard Bragman, now Nardicio? Slater sure knows how to attract the limelight of those who also seek it. UPDATE: Apparently this is a fake Steven Slater? Jesus, I’m not sure who’s sadder: Page Six, Naridicio, the sad man who finally found somebody mildly famous to impersonate, or us for falling for it.