Since I wasn't intending to go to the model session, I didn't have my sketchbook with me---
but I had my iPad!
It turns out I ended up having an interesting exercise. I usually tend to concentrate on the details when I draw on paper, but since I don't have as good control on the tablet I was able to look more at the overall shape. Still prefer analog sketching for these kind of things, but it may be fun to do this time to time.