I wish I could make the classes a little more different, interactive, etc, but Body Pump is a choreographed Les Mills program that the gym pays a lot of money to have. Though I can pick a past workout to do (which is difficult because they don't sell past releases), each is basically the same. The back track always has a few dead rows, into a clean and press combo/row, then a triple row... blah blah. Just in different orders with different music.
I didn't get involved for the money, it's not very much, but it is nice to have a little bit of extra cash. Originally, when I was the manager of one of our gyms for a while, one of our group fitness instructors was going to be out for weeks, so I sat in on her class and said... um yeah I think I can do this. So I freestyled a barbell class (no choreography, totally winged it) a few weeks. Then I left and got a real job, and another of our gyms, which had been my gym when it was a Powerhouse previously, expanded and began offering group fitness and the owner, which I was friends with said I could teach there so I put myself through the training (paid some money for it), and now I teach his biggest drawing classes.
YOu know, and it's silly too, because when I had tried taking this class last year, I didn't really enjoy it. What the heck made me think I would like teaching it? I thought... oh, gym, teaching people, having an audience, getting paid to workout. Seemed good at the time
So to answer questions, it's not about paying the bills or because I HAVE to do it. I don't think I would consider quitting if it were. I am afraid of disappointing people though.