Hah, drinking has been a big part of how people wintered over at the South Pole since almost the beginning, e.g. in 1967: "Trivia: average winter alcohol consumption was 54 cases of beer and 6 cases of liquor for each of the 20 men (some of whom were nondrinkers)." That's quite a bit...
Source, which is worth spending some time exploring: http://www.southpolestation.com/trivia/igy2/igy2.html