Just as yogilates is the new pilates, Joe Lieberman is the new Ralph Nader and turquoise is the new pink, there's a new libation that's rapidly becoming the Mixed Drink of the Moment. It's the Moscow Mule, and it is to summer 2006 what the Mojito was to the summer of 2004. Contrary to its name, the Moscow Mule hails neither from Russia nor a Midwest horse farm. It is a pure LA concoction,......