How about some beer or wine or a nice dinner after browsing Barnes & Noble’s aisles for the latest Stephen King thriller or an adult coloring book? The bookstore chain said at an investor conference on Thursday that it would open four concept stores in fiscal 2017 that will feature bars offering wine and beer, along with better food, in cafés twice the size of its usual food spots, its latest effort to rejuvenate its business. The first store will open in Eastchester, N.Y., about 30 miles north of New York City, in October and have amenities like a fire pit and bocce court.