Yoga at LA Fitness or similar

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Has anyone taken a yoga class at LA Fitness (I'm in the midwest, but anywhere is fine)? Just trying to get an idea of the level/style they teach. Also, do you find that the attendees are fairly mixed in levels/sizes? I understand that yoga is not about who else is around you and it is about inner focus, but still being plus-sized adds a bit more self-consciousness about looks - at least for me. Plus this gym's studio has mirrors on 3 walls, and the fourth "wall" is a window facing the rest of the gym. I have practiced in smaller groups at yoga studios, but I figure since I'm paying for the membership, I would like to try out the selection of classes available. Any input would be great.

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