Okay, so I yoga'd in a gym, still; and, still, in the mountains of western NC. This one, at least, was on the road, and had not been previously graced with my presence in this manner.
Beyond that, not much to say. The gym was a gym, with an appropriately wooden-floored stretching-room (which I actually used for stretching; it felt like resting in a rest room, sort of). There was a complimentary mat, always a nice thing. Likewise, a complimentary private bath/shower-room in lieu of a public locker room, also always nice to have. I was happy, yoga'ing here.