Good point Hesk!
A couple of years ago the missus and I went to see a currently very famous person, who plays in a band, do a solo evening at a local folk club.
When we bought our tickets the organiser, having had Jack's Rake at the club on a number of occasions, asked us to do a floor spot. We were mildly freaked at the idea of playing to a huge audience of the Sheffield Folk Gliterati and, indeed, to the famous person in question without the massed ranks of the rest of the band to hide behind but we accepted - always ones for a challenge!
So, we chose three Jack's Rake numbers: a pair of tunes, a trad. song and a cover version and rehearsed like billy-o to make sure we could do them justice with just the two of us.
Come the evening, we did our bit and, to be honest, I think we did a pretty good job though we were clearly bricking it - there were a lot of people in that audience I would pay good money to go and see - and the two other floor spots were impeccable.
The main act, on the other hand, I don't think I'm exaggerating in saying that at least half of the songs had very obvious mistakes and about a fifth of them had full on stops. It became clear that the performer, used to playing in a band, remember, hadn't bothered to do much, if any preparation for this low key gig. Perhaps the fact that it was a tenner a ticket had passed them by.
Don't get me wrong, it was still an enjoyable gig but, if I hadn't been part of it, I would have been mightily peed of by the respect the main act showed to the audience, in terms of preparation.