CHAT ROOM

Your decisions sound reasonable to me, but you probably should have discussed with the promoter in advance what the people that normally attend that particular class could already do. I think you should have been paid.
Incidentally, how did you know the class were not up to your expectation of 'Intermediate'?
The reason I ask is that I recently attended a class which in theory was actually below my level but the teacher was someone I had never seen before. I struggled with the moves, even though they were not difficult, simply because the teacher ordered the leaders to use a hold which personally I find peculiar and does not work for me. The teacher may well have concluded that my level is lower than what it actually is.