A gathering place for travelers and locals alike, a good hotel bar offers a quiet reprieve in what is typically a rather luxurious environment for patrons to relax after a long day. And while some hotel bars might simply offer just that, others, like those on properties that have been around for a while, might offer a bit of history, too. Some of these hotel bars have continuously pushed the envelope of cocktail creation, whether by creating now world-famous cocktails or perfecting jaw-droppi...