That's the thing--there aren't. Like, I don't have to go to that particular class on Thursdays, obviously... but she also sometimes goes to other classes at that studio at different days/times, so basically if I want to be 100% sure I won't run into T, I can't go to that yoga studio at all which means that I can't take yoga classes full stop (b/c the other two yoga studios within a 30 min drive are like $25 a class even with a student discount).

And obviously I don't want her not to go to yoga just because of me, especially if she doesn't mind. (I think sometimes that these kinds of things are the realities of living in a small town... along with running into your awkward male neuroscience prof while you are buying tampons, and bumping into that one guy you slept with that one time while you are on a first date, other things of that nature.)

This happened a while ago and she told me that the following Thursday she was going to be out of town if I wanted to try it out when she wasn't there. (I think she sensed I felt weird about it, even though I didn't say anything.) So I went and I liked it so much that I've gone back to the studio several times. I still haven't run into her but I always get a little nervous when I walk in the door...