I do a regular gym class on a Sunday morning. We knew last week that the regular instructor would be on holiday but were told cover was arranged.
Their system has been accepting bookings all week and the class was full. They gym would have known who was due to attend and would have been able to contact them if necessary.
Anyway, you've probably guessed, come this morning 30 people waiting in a class with no teacher. The gym didn't even come and tell us it was cancelled, although they appeared to know when we went to investigate,
It was interesting to see how different people responded. Some were "oh well, let's go in the gym/have coffee instead", some just packed up and went home with a bit of muttering, a few were absolutely calling for blood.
How would you have reacted?