Sorry, but I've got to disagree with this. If someone puts on a lame show when sober, blame the performer, not the lack of alcohol. As performers, we have an obligation to provide a good show to the audience. I've seen many more shows ruined by alcohol and drugs than by lack of them. It's not even close.Not drinking may not always but often leads to lame shows particularly with Rock and metal bands where the band might go up onstage 100% sober and never miss a note but have a boring performance because they look like a deer in the headlights or stare at their hands the entire show, or appear like they aren't into it.
Frankly, if they aren't in my band ruining my shows, and if I'm not paying my hard earned money to see them show up wasted, I don't care how much alcohol or drugs anyone does. I will say (as I've said before) although I've heard the stories more times than I can remember, I've never seen or known anyone that played better drunk or stoned than sober; and no matter how many times I hear it, I doubt I'll ever believe it.