You may feel as if you’ve stepped into Sardinia in this charming Williamsburg, Brooklyn, wine bar, where tasting vino from Italy’s wine appellation regions is as easy as ordering a two-ounce sample (marzianetto), then a wineglassful (bicchierre). Savor the characteristically Italian bouquet and toast with the crowd, or snuggle behind a rustic table with a homey meal like sheep’s milk cheese, salami, arugula salad and a panino of mortadella, fontina, basil and capers on ciabatta.