According to stereotype, women are supposed to run into the city for a dose of cutting-edge chic. Gretta Luxe has successfully reversed the paradigm: Since it opened four years ago, it’s had city fashion aficionados happily schlepping out to Wellesley for designs and investment pieces that are hard to find elsewhere, including Chloé, Barbara Bui, Miu Miu, Habitual, and Strenesse. There are accessories, too, from Marc Jacobs bags to Jimmy Choo shoes. But this is no mere label shrine. The helpful staffers, each blessed with impeccable taste, have well-tuned radar for determining which clothes will flatter a customer (and a merciful flair for avoiding those that don’t). If that isn’t worth a quick jaunt down Route 9, we don’t know what is.