I know a bartender who would drink a fifth of whiskey every shift and still be totally coherent at the end of it. (That was a decade ago and she's still a barte

I know a bartender who would drink a fifth of whiskey every shift and still be totally coherent at the end of it. (That was a decade ago and she's still a bartender... but I have no idea how much she drinks now.) Some of it has to do with biology, but some people can just adapt.