Not on a par with some of the stories above, but today at the school where I volunteer (volleyball coach) a couple of the high school boys brought their guitars to lunch, and after eating, they and some others sat around singing and playing until time to go back to class. I was far enough away that I could not tell WHAT they were singing, but the playing was pleasant enough, and definitely something to encourage. I hope they do it again, maybe even make it a regular session. Forty years connection with schools, and this was the first time I had ever seen this sort of thing done.