“Glee” star Mark Salling flexed his charm on “90210” beauty Jessica Lowndes at the Axe Lounge in Dallas on Saturday night. They were spotted cozying up in the lounge area at a pre-Super Bowl party until Salling left at about 3:30 a.m. and Lowndes left shortly after, a spy said. But a rep for Lowndes insisted, “They only chatted. They are not dating.” On the other end of the long sofa, Reggie Bush chatted up tennis champ Serena Williams.