After a hot summer bike ride, nothing tastes better than a good root beer float. But why not substitute sarsaparilla for stout? I like my floats with all sorts of malty, sweeter beers, and after a morning bike ride over the weekend my boyfriend and I hit on what might be the world’s greatest beer float. The beer:  Southern Tier Brewing Company Creme Brulee Stout Unlike many brews by the Stout Kings of New York, Creme Brulee doesn’t have any chocolate flavor –– instead, it’s bursting with vanilla bean and caramel flavors thanks to real vanilla bean and dark caramel…