I agree with a lot of what is said here,dress to suit the audience, dress to suit the gig, dress to suit the bra-less, etc. One other thing to keep in mind is --Are your clothes distracting from the music? My band doesn't all dress "ALIKE" but it is amazing that w/o consulting each other, we all show up in the same type of clothes for the same gig. We play mostly old time and bluegrass, so we usually wear jeans, and quite often we all wear some kind of "blue" tops. If we "dress Up" the ladies usually wear jeans and silk shirts. What you don't want to do is to have the audience looking at your clothes instead of listening to the music.