I agree, they should be happy that they have mostly excellent people there to teach them, rather than complaining about the room color.
I had to pay for my own tapes, so I understand the expense, but I know nothing about music, so I could justify it.
I wouldn't say anything to this person about her music, since I rarely attend her class. We don't seem to have so much cattiness about roadie vs. aerobics,it's just sort of obvious. I was at at a 9:30 AM class, which I call the "housewife" class... please forgive me about making assumptions about these people, but it's been pretty much the same at this time no matter who is teaching. Same at step class, too.