Do you have video to prove your drunken performance was better than your other performances?
The way I approached playing live was the same way I approached going to my job, because the band was a business, just the same as my day job. I don't drink before I go to my day job, why would I do the same thing before playing a show? After doing my first gig, I never got stage fright because we were playing so often after that. Remember, repetition is what drives away stage fright, not alcohol. If you're nervous when you play and you drink on top of that, you're just drunk AND nervous.