I was in my dream. I've noticed that I'm increasingly in my dreams, whereas my dreams used to be largely peopled by fictional characters. I'm certain that must mean something about how my brain is working, but I don't know what it would mean, per se.
I was sitting in a circle of people, on sofas, and someone in the circle had discovered the sheet music for the "lost" verses of "Summertime" from Porgy and Bess. So we were going around in a circle and each taking a turn singing a verse of the song that we'd never heard before.
I don't remember any of the new lyrics, but I do remember improvising on the tune a little bit and everyone in the circle clapping when I did that.