Gran Caffè Quadri is a historic spot in Piazza San Marco underneath the Procuratie Nuove that we like to visit on a cold winter afternoon when there are no orchestras playing outside and no summer surcharges. Find a spot in one of the pastel frescoed rooms and order a signature spritz made with Barbaresco Chinato and tonic water that gets served in a hand-blown Murano glass. There is also a great fine dining restaurant upstairs that serves a tasting menu and has an equally good view of Piazza San Marco.