That's a common story with grand kid's performances. My grandaughters were both in a high school that had an outstanding theater program. Over the 5 years they were involved, I mentioned hearing loops every time I attended a performance. They did have an FM system so that helped. I brought my own neckloop so I didn't have to remove my personal hearing devices. It is costly to install hearing loops, but in the long run, having something that people in the know can simply plug into w/o having to request a battery powered receiver from student volunteers who have no idea what they are for, would be much less trouble.

Again, it's about education and advocacy. We have to keep asking for it wherever we want or need to hear.