Chain restaurants are a dime a dozen. When a world-renowned chef opens a third location for one of his signature restaurants in your city, however, the word “chain” goes out the window. Such is the case with Bar Boulud, Boston (Mandarin Oriental Boston, 776 Boylston St., 617-535-8800, barboulud.com/boston). The brainchild of James Beard Award-winning chef Daniel Boulud, Bar Boulud follows in the footsteps of the New York City and London outposts, offering traditional French fare. A New England flair is added to the Boston menu by such ingredients as Wellfleet clams, crab from Maine and lobster from Gloucester. Bar Boulud never loses its French accent, though, featuring fine wines from Burgundy and the Rhone Valley, as well as Parisian charcuterie from Gilles Verdot.