4th AVE. goes from “Wasteland to Tasteland,” according to the Daily News: “Even as the rest of Park Slope sprouts bistros, Brooklyn’s Fourth Ave. stays a bit, well, scruffy. Things may change thanks to Mule, a cool new coffee shop at 67 Fourth Ave. between Bergen St. and St. Marks Pl. Right now, Mule has Seattle’s Caffe Vita coffees, snacks from Two Little Red Hens and other bakeries, a wrought-iron bar and a 16-foot communal table in the backyard. In the future, look for a lunch menu and a wine bar in back. …