Only gig I was going to that I ever remember being cancelled was Gary Glitter. It was a Christmas show in London in the mid 90's, before the truth about the man came out obviously, and we drove all the way down, saw the Village People and waited for Glitter to come on. After a while it became apparent something was wrong, then a bloke came out and announced Glitter had injured his arm (I think) and wouldn't be performing. So we drove all the way back. Couldn't make the rescheduled gig in the new year for some reason, so just got our money back. Apart from that I seem to have been very lucky over the last 30 years.
You couldn't buy me with a million babe