I don't understand why you need alcohol at work so bad you wouldn't want to work there without it. To me, that sounds like a dependency issue or possible wanna-be-fratboy-ism.

Booze is awesome but there's a time and place for it. If someone gets loaded at work enough to impair their ability to drive, then gets into an accident and injures or kills someone, their employer (in the US at least) could be liable in part. It's one thing to go out with your coworkers after work, or maybe even have a beer over lunch before going back to work, and it's another to need booze on premises.