My band performs usually about 3 or 4 gigs per month. In fact, we're playing tonight at a very busy bar. I recommend saving the drinking until after your performance. Alcohol seriously impairs your motor skills, especially if you're a perfectionist and play a lot of intricate/speedy stuff. If I do start drinking on stage, it's not until the second to last song. That way we're done our set before I feel the effects. Of course, I'm also a seasoned drinker. ;)