I'm with Captain Swing near the top of this post NOBODY has the right to be listened to. Yes I believe in being polite to people but if they're boring it's up to them learn how to engage an audience. Some people are just totally fucking inept and not worth listening to, it's up to them to learn rather than expecting people to fall over themselves and gladly accept their ineptitude.
I myself have performed in plenty of non folk club/pub situations where I've just been musical wallpaper and nobody has listened, and on occasions some of these have turned out to be very good nights. It's up to the performer!