I feel like here it's almost culturally acceptable to have a drink daily. You get more weird looks if you say you're not drinking at a get together after work, or a friend's birthday, or any sort of gathering really. I do think anything can be classed as an addiction if you have a reliance on it. It's one thing to enjoy a glass of wine daily, for instance, but if you truly cannot manage without it (for instance you'd get mad without it, or have to race to the store to buy a bottle so that you had your glass filled) then there's a problem. It's a fine line!