I've read a number of VIM posts about having the bartender fill up a large glass or plastic bottle with wine or liquor to bring back to your room. This sounds like a great idea and something that I would like to do when I go there later this year. Is this a common practice? Are you asking the bartender to do something that they really are not supposed to do? I would be uncomfortable if it's something that would put the bartender in an awkward position of breaking the rules to make the guest happy.