An idea for how wine and beer could work: When you drink alcohol, a new bar appears in the hp bar. As alcohol is consumed, the bar goes up. When the bar is less than 1/8 of the soft hp, there are no negative effects. As the alcohol bar takes up more of the shp bar, you work slower (basically anything with a hourglass wait takes more time the drunker you are.) Also after about 1/8, you can't sprint, after about 1/4, you can't run, and after 1/2, you can't sprint. The bar goes down very slowly.
As for the benefits, for every point of the alcohol bar when drinking beer, you get a 3% increase to learning ability. As for wine, when first bottled, it does 1% increase. As wine ages, it slowly gets better. After say half a ingame week, it increases a percent. For every time it ages, it takes a third longer for each age increase.
This way beer would be a nice commodity for newer players. As players are in higher levels they can be more "refined" and drink aged wine that is more intensive to make and store, but you can have more of a learning ability bonus at one time without having a negative effect on your working ability.