I never smoked, and I hardly ever drink... But I do drink sometimes
But I only noticed the effects of alcohol once... And I didn't get drunk then.
I drank 6 glasses of Fanta+Vodka...
if you wanna know, about the size of a beer glass, one-fourth vodka

Everyone asks me how much vodka in a glass so... :s
Anyway, only then I noticed the effects a little bit :s
And I usually really don't feel like drinking alcohol, so I have the bottle of vodka I bought 4 months ago still next to me here xD