The YMCA must have a gym or a basketball court. Could you talk to the instructor and ask him/her to find out if there is another space available? Surely, the instructor realizes how difficult it is for people to learn on a yoga floor. Maybe, no one has ever complained before so they didn't think it was an issue.

Have you thought about forgoing the shoes and wearing just socks or nylons?

Much more slippery and you are less likely to take out your ankles.

I probably deserve to get shot for this, but it DOES work- even if I found it out on accident.

Okay- years ago, before I discovered a real stylist (a real hawtt one) and real Product, I used show-sheen on my hair in a pinch. I was spraying my hair upside-down, so when the mist hit the floor, it dried- I turned in it barefoot- and almost went down!

Anybody NOT from horse-ville doesn't know that Show-Sheen is a product made by Absorbine and is basically diluted, smelly, liquid silicone. It helps a horse's coat lay flat, sleek, and shiny... and is NOT NOT NOT for use in the area where the saddle goes- why? You'll slide RIGHT off!

Showsheen comes in a big spray bottle (trigger-nozzle), and when you spray it on your socks, you will slide, even on carpet. NOT recommended obviously for spraying on real dance shoes, but maybe a crappy pair or some socks. It MIGHT help- but probably won't. Best place is to just take lessons somewhere that cares about other people's legs!

DivaGinger. Sounds like a solution but what are the Yoga people going to say. We have a product here called Pops. Its been around for years. A tiny bit under your chair, rub the soles of your shoes in it and in no time at all the whole floor can become a skating rink. The people who used to bring this with them were those who danced in there ordinary shoes.
You wouldn't beleive this . One guy whos job it was to prepare a floor said I test the floor by taking a run at it . If I can slide about four or so yards its perfect for our clientele. Not for a serious dancer.