Tea and coffee give a small boost to study rate and work rate as well as the drain of phlegm while working would be lessened a bit.
Rum would give a boost on combat, shall we imagine a berserker pumped full of vicious rum

Cider and beer/ale should be considered as pleasant drinks so players can walk faster and they have certain gluttony points as well. Perhaps on phlegm and blood but only work when having with proper food.
Potato spirit is one beverage I haven't figured the effects so if anyone has ideas, feel free to suggest.
Also, drinking alcohol will have stages :
A toast : a bonus stage when players receive boost from certain beverage (unstackable)
Tipsy : no negative effects but character's movement will be unpredictable and slightly hard to control.
Merrily drunk : Move with great difficulty, character has tendency to stand still for a while.
Drunk/plastered : Drains on BB and phlegm until character falls flat on the face and remain unconscious for 2 minutes.
These negative stages don't start according to the number of glasses players drink but shall depend on individual's phlegm with a 5-10% random chance on merrily drunk and drunk stage to happen so players won't abuse it and have to gauge the "ability to hold their drinks"

To brewery, as in H&H, players only need a pressing machine, barrels and hot water to make drinks. I'd like to make it more complicated but more convenient in its way with a brewery. It could be an entirely new building, built only by learning humble abodes and art of brewing skills. Also this brewing skill allows building a complex of brewing machinery which can only be placed in brewery. And almost all the beverages mentioned above would be made there. Tea and coffee only need grinding tools, drying tables and hot water.