I had the same thing happen. one event was listed as Northumbrian tunes by Alistair Anderson. I went along expecting to hear tunes by Alistair, but it turned out to be a workshop to teach people some tunes.
I am fully appreciative of the fact that volunteers work tirelessly on our behalf and do a grand job, (thats why I buy a season ticket, when I dont actually go to enuff events to warrent one, as I feel that in doing so it supports their hard work) so Im not really criticing - honest!!! its just that the word "worksop" would have been useful.

and Steve your Mondau session sounds great, wish I had known about it before, but I will be there next year!!
Lin