What a great idea to do on a large scale. Back in Atlanta, I once subbed in a friend’s string quartet that met once a month to read through a quartet and eat a home-cooked dinner at someone’s home. It was so much fun I was sad their violist was out of town only one week.
Hmmm, looks like a DC area chamber music group does something similar. I bet I know somebody who plays with them I could ask about it.