Mate of my Dad's, Clive Gregson had a pair of good 'uns.
He did one gig to 9 people, and a horse.
Another time he got to the venue, and there wasn't a single person there other than the promoter. Turned out the venue had completely forgotten to do any promo whatsoever. When he demanded payment, the venue owner said he wouldn't pay him as he'd not done the gig.
So he did the gig.