Time-honored cocktails like the New York Sour and the Sidecar were born during the era of Prohibition, the blessedly bygone social experiment that turned drinking into an underground adventure. In those days, hard beverage options were usually made with homemade hooch and flavorings of dubious origin and quality. Thankfully, a cocktail renaissance has emerged in many of today's bars, where inventive drinks showcase both the artistry and craft...