Classic bourbon cocktails — the Old Fashioned, the Manhattan, the Whiskey Sour — have undoubtedly earned their keep as mainstays on any reputable bar list. While these drinks have stood the test of time, some experts like Liam Weitz, head bartender at a cocktail bar in Brooklyn, believe it’s time for both seasoned mixologists and curious at-home imbibers to start thinking beyond what’s expected from the American spirit. For Weitz, bourbon’s versatility goes far deeper than the swe...