’SWELLEGANT: Avenue magazine celebrated its first issue under new editor in chief Peter Davis last week with a party at Jimmy, the rooftop lounge in the James Hotel. Cover stars Chris Benz and Mickey Sumner — daughter of Sting and Trudie Styler — were on hand, along with Michael Bastian, Ally Hilfiger and Hannah Bronfman. A slew of uptown and downtown girls who made the issue’s best-dressed list, such as Jenna Lyons, Julie Macklowe, Mary Alice Stephenson, Eugenia Gonzalez and Genevieve Jones air-kissed through the crowd. Benz talked up his recent collaborations with Alejandro Ingelmo in shoes and Patricia Underwood in hats and said he was focused on building his department store business at Saks Fifth Avenue. “Chris and Mickey personify the new direction of the magazine, which is cool, chic and, most of all, fun,” said Davis of his youthful first cover for Avenue, which is distributed to high-income zip codes in Manhattan.