I normally have 2-3 drinks everytime I am out playing pool, but this is spanned over about a 5-6 hour period, so I don't feel it is hurting or helping me anyway.
If I have a couple of grins before doing anything, I'll be looking for a new wife.
I don't drink, but I used to and I didn't think then and don't think now that it helps your game. It creates an illusion of helping your game, but that's all. On the other hand, if done within proper limits neither does it hurt your game. Of course, "within proper limits" therein lies the rub.