I can't remember the deep lore now, but I always thought bacta worked on contact? Like, if you have a cut, bacta works from the outside until the skin is healed etc.
So if you wanted to cure a hangover you'd need to get it inside somehow.
I was just curious as they could have something that is essentially the same in narrative function, but not technically alcohol since it's a completely different world from ours. The bar could serve "booze" but it's not the byproduct of yeast fermentation.
I think they've found alcohol in some nebulae though so I guess the argument could be made that it's something that probably exists throughout the universe whether there's yeast to make it or not....