So this was from another class session--I'm taking a "reportage" or journalistic drawing class and we have to go out and sketch in public. (Also known as: staring at people and being creepy.
We met at this outdoor bar near the studio. This was a lot harder than the jazz band practice was--musicians (or any kind of performer, I guess) are used to having people staring at them. They were also preoccupied with playing their music which helped me feel more like a "fly on the wall" or whatever. Not so at the bar. I had to work on things episodically so that I wasn't staring at people for too long at a time. Also, people move around a lot.
I discovered that the further away people are the easier they are to draw.