Oxbgirl--I was just joking with Robin. We are all at CSA at the same time. I do work out, but I'm too un-coordinated to do Zumba. The only moves that I have are trying to find my room at the end of the night!!!!
CSA does have guest instructors. I was speaking with one a couple of years ago. CSA will put them up in a GVS, I think for free, in exchange for teaching a class once a day. Check with the main office.
We've met a couple several times at CN and one of them (the wife) is the guest instructor. The last time we saw them they had 2 weeks at CSA, 2 weeks at CN and were then on to 1 week at CSS. Sounds like quite the deal but we didn't ask how they registered.