I has a friend who told me a story of him and his buddies doing some mdma skiing. It was so cold their metabolisms were so slow in processing it that it didn't really effect their skiing; but when they went to the lodge for lunch they got higher than hippies in a helicopter. I don't think they left the lodge.
But one or two beers is a confidence boost, more than that and I'm tripping over my skis in the lift line.