Take some advice from an old hand, getting drunk NEVER makes you play better, it just makes you (and only you) think you are playing better.

No one enjoys a beer more than me however alcohol / drugs and performing well do not mix !

You spend hours honing your coordination only to ruin it by getting ratid...bad idea ! Who wants to watch some old rummy missing strings...not me !

Think of your favorite guitarist and then ask your self if they get drunk before going on stage ?