“Real Housewives” star Sonja Morgan was less than sociable at Southampton Social Club Friday night when the tab arrived, spies say. The Bravo diva partied in a VIP cabana at the Paige Hospitality hot spot and ordered a bottle of Don Julio tequila with pals. But when a waitress arrived for a credit card, Morgan allegedly balked, “I never pay!” Our source said owner Ian Duke discounted the bill but threatened to call the cops if the tab wasn’t taken care of. But Morgan tells us the incident was devoid of drama except for some overzealous fans. “When the bill came, we saw it was almost $400 and said that doesn’t seem right,” she said, adding that Duke had offered to “comp a bottle” when they arrived. “We had a normal conversation. We said the bill was too high. He said it was OK and apologized. Then we stayed and danced.” Morgan adds that she was with “a very wealthy guy” who paid with his credit card and that she even threw in extra cash as a tip. The Sonja in the City caterer says the real drama went down when a fan invaded her VIP section to grab her: “These girls got very excited. Ten girls and three boys jumped the rope into our private section. I bruise really easily. This girl grabbed me. My intern had to tell her, ‘Don’t grab her!’ I got a bruise from this girl.”