I never understood the drinking while skiing thing either and rarely do it. If I do drink, it'll be something like a hot chocolate with peppermint schnapps with lunch. Even that is pretty rare though. And beer for me is even rarer while skiing. I could probably count on one hand the number of times I've had a beer with lunch and then gone back out and skied more after that. I generally prefer to save my drinking for some wine with a nice meal at night after a day skiing.