Nice to hear there is still honour among musicians to stick by their promises.
We haven't had any gigs that were dire...most have some redeeming feature, even if just being an experience to relate in an amusing way at a later date...however we have had some interesting ones...
One gig was an outside private party in someone's garden. We were well into the last set which people did seem to be enjoying,honest!... when, the party host decided it would be nice if people could have some other entertainnment ready for when we finished. He then proceeded to get a lawnmower out and started mowing and area near our stage so that people could play the the game (I think it had a golf theme...) more easily....we wouldn't have minded but he forgot to tune the mower and it was in totally the wrong key...