I've subbed on short notice and read on stage to do it. Never has anyone complained; in fact, they tend to be relieved to have someone there and prepared on short notice. (I'm a tad more discrete about it.) I saw Jeff Berlin sub for Chris Squire at the Greek Theater with two days notice many years ago. He was reading charts; no one complained and the band was happy to find someone on short notice. (It was in the news.)The barefoot thing is strange, but I'm really surprised at how many of the posters here have never just had a last-minute pickup gig where you were given a set with very little notice. Do ya wanna nail it, or not? Not everyone's playing Midnight Hour and Lay Down Sally.
Hell, I saw a Stanley Clarke gig where all the bandmates had charts.

