There's a happy ending to this story, and it tells you something important about where retail is headed in America. The former Macy's store — originally built in 1930 for Strawbridge & Clothier — has been reinhabited by Life Time, a company known for its high-end fitness centers. But its new Suburban Square location is much more than a place to work out: The 80,000-square-foot branch includes a full floor of coworking space, a child-care facility with studios for both kiddie yoga and Spanish classes, a full-service beauty salon, and a cafe whose menu runs from protein shakes to fresh-cooked harissa chicken platters. Instead of trying to sell you the latest clothing fashions, Suburban Square's new tenant offers you an entire lifestyle. After all, it expects you to buy your clothes online.