i mean, i don't put hours of thought into what i'm gonna wear for a gig, but we make it a point to try and at the very least not look sloppy. i personally can't stand sandals or slippers in concert, i think they're just incredibly sloppy.
there's a reason why even great musicians like Satriani and successful bands like Taking Back Sunday put at least minimal effort into their appearance, and it's because even though they could probably do a show in pyjamas and get away with it, they respect the crowd. the audience has come to see the performer perform. it's a show, and you owe it to your audience to try give them a show that they'll remember. so you play your music as best as you can, you excite and engage the audience as much as possible so they relate to you and really get into the groove, and you put in at least some effort in your appearance so that your audience doesn't feel like they came all the way there just to watch someone who looks like a homeless guy.
and seriously, i think this applies to uni students here too! it's shocking how some of these kids dress. it's not a bloody wet market, it's an institute of higher learning, a place of academia. honestly, how can students there walk around in slippers and all that and feel ok about it? what happened to the respect for institutions of higher learning? i have never ever seen university students as sloppily and disgracefully dressed as those in singapore. ugh.
i see this as basic courtesy; no need to spend hours or agonize over what to wear, but don't look like you just stepped out of a wet market.
(haha now you're all seeing my conservative side come out)