LUNCH LADIES: A well-heeled group of ladies including Heather Mnuchin, Sloan Barnett, Judith Giuliani and Barbara Walters filed into Cipriani 42nd Street on Thursday for a benefit in honor of New York Presbyterian Lying in Hospital. Akris, which sponsored the event, treated guests to a midmeal runway show of its fall collection. “This event combines fashion and Bellinis. My favorite things,” said Barnett, who acted as co-chair. Akris showed its support in more ways than one: Caroline Brown, chief executive of the company’s U.S. division, switched bras with Barnett, who suffered a wardrobe malfunction moments before she was to hit the podium. “This shows just how committed a company they are,” the socialite told the crowd.