I found some pirate rum and used it like a potion. The screen got blurry for a bit but then everything was normal. Is there any point to alcohol in this game other than just to make your screen blurry for a couple seconds?
Pirate Rum is completely useless, it just blurs your screen for a while.
However, the other alcoholic drinks (Wines) in the game do have a use; they're potent HP/MP potions. They're dropped by enemies in Oryx's Wine Cellar though, so they're rare and hard to get.