Where I work it doesn't really matter what you look like, as long as your clean, tidy and professional looking.
We do have a standard of dress when we go to shows (clean, nothing tatty, nothing with holes in, neat respectable clothes that look professional)
but at home as long as you are wearing appropriate clothing (ie not having your belly showing or your boobs hanging out, wearing pants, hair tied back, and no facial peicings that could get caught) then anything goes really.
We don't care about tattoos, pretty much everyone has at least one.
I personally don't have peicings besides my ear lobes anymore because I've had several helix peicings ripped out from being caught.