Gladly I'm not a drinker so it doesn't affect my game at all. I have multiple friends who do drink and play the poker, they get wild and crazy, not the best of ideas for them.
When you play a game you have to look for the reason why you are playing it, i.e:
if poker is work, then you don't need to drink alcohol
and if poker is a hobby and entertainment, then why not have a drink