I like the class until the instructor says to watch yourself in the mirror

I found a Saturday movement class that is close to home, affordable and welcoming in almost every way. The instructor learns names. Nobody competes for the front row. The music is loud enough to be fun without turning every direction into a shouted guess.

Then she says, “Check yourself in the mirror.”

The studio has a full mirrored wall. I understand its practical purpose. When the class faces forward, people can see the instructor and their own position. For me, though, the mirror changes the activity. I stop noticing the music and start reviewing my shirt, my expression and whether I look like someone who belongs in the room.

I tried choosing the back corner, but the mirror is still there. Looking at the floor makes me miss cues. Covering part of it is obviously not my decision. I have also considered asking the instructor for alternatives, yet I do not want a private preference to become a class-wide issue or invite questions about my body.

The frustrating part is that I enjoy the class when we turn sideways or move across the floor. I leave in a better mood. I am not seeking reassurance that nobody is looking at me; I know most people are busy with themselves. The problem is that I am looking at me.

I could choose a different class in a room without mirrors, but it is farther away and less convenient. I could keep attending and treat the mirror as neutral equipment. I could also tell the instructor, simply, that visual cues directed toward her work better for me than cues directed toward my reflection.

Has anyone handled this without making the conversation bigger than it needs to be? What is a reasonable accommodation to ask for when the environment is usable but not comfortable?