Yes, actually, for the first time now i think about it and usually I really am better when having 1-2 drinks and i smoke so cigarettes ofcourse I would play bad if Im not allowed to smoke and need to smoke. Never heard of casinos where you cant smoke or drink. In every casino in Bulgaria they actually give you as many free drinks as you want while you play(coffe, coke, beer, vodka, whisky, enything you want) and an ashtrasher and in most casinos they sell cigarettes inside, so you wouldnt have to get out of the casino. :elefant:
Depending on the type of drink, an example is in the movie Casino Royale, played by Daniel Craig who takes a very smooth Vesper Martini, the important thing is that you drink a quality drink, so the focus will be on the game and not the scratched throat.
I've played when drinking and I've played without a drop of alcohol and I think I play quite the same both ways.