i think it works for some people (see: conor oberst... it's been a long time since i've seen him [next week!!] but as i remember circa 2004ish he put on much better shows drunk than sober) but not being THAT drunk to the point of being incoherent and belligerent. i think there's definitely some performers that are a bit shy and much better with a drink or two to loosen them up or whatnot and hell, if i were onstage i'd probably take some drinks up there with me too - but there's definitely a line between being tipsy onstage and it making you more playful and being so beyond drunk that you are incapacitated, belligerent, and disrespectful.
i have some wonderful memories of tim kasher playing in a warehouse-turned-theatre and giving and audience member some cash to go grab him another glass of wine from the bar...
THANK YOU i've totally fallen out of this scene but from what i've seen/heard of touche amore and defeater they're amazing and if only i had more time in my life like
I agree. I'm sure it's very nervewracking to be up on stage, especially when bands become more popular than the members may have anticipated. So, having a couple drinks to "mellow out" is no big deal at all. It's just, like you said, the point where they are absolutely drunk and can't perform and/or are rude to their fans that's irritating.