They say you shouldn’t mix family with business—but whoever first said that probably didn’t have sisters. Just ask Colleen and Hailey Brooks: the collaborative duo behind Moss, a new private members’ club in Midtown Manhattan. When you arrive at 520 Fifth Avenue, a white stone building with soaring arched windows comes into focus. “Versus the steel glass buildings you commonly find in Midtown, it’s very soft,” Hailey says, curled up in what will soon be the club’s piano lounge. Despite the gentle nods to Art Deco and quintessential New York City architecture, it’s a new build. In fact, it is now the second tallest building on Fifth Avenue after the Empire State Building—and in addition to Moss , it will feature luxury residential and office space. “It’s been a pleasure for Colleen and

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