Good God you’re gonna make me cry. Or is it the Bourbon Coffee Stout...?
The Encyclopedia Galactica describes alcohol as a colorless volatile liquid formed by the fermentation of sugars, and also notes its intoxicating effect on certain carbon-based life forms.
The HHGTTG also mentions alcohol. It says that the the best drink in existence is the Pan Galactic Gargle Blaster, the effect of which is, "...like having your brains smashed out by a slice of lemon wrapped around a large gold brick." The guide also tells you on which planets the best Pan Galactic Gargle Blasters are mixed, how much you can expect to pay for one, and what voluntary organizations exist to help you rehabilitate.