I went to the Food Court in a local mall today, to just sit there and draw random people on the iPad. Was great practice, trying to capture them before they got up and left. Also, drawing "incognito" was an interesting challenge. But I never got caught!
Yeah, yeah, I could've taken more time on the chairs and stuff. I was more interested in drawing fast, and playing with the iPad rather than spending too long on making any one drawing "perfect".