One of the capital's most celebrated cocktail destinations, The Library Bar – distinguished by its outstanding mixology and venerable "liquid museum" of spirits – offers the warm and intimate atmosphere of a private club accompanied by a vibrant ambiance that makes it a popular choice with Knightsbridge and Belgravia's well-heeled locals as well as hotel guests. The bar is home to cognacs dating back to the 1770s, as well as spectacularly prepare...