I'm not sure what movies or shows you're referring to, but yes. You have model sessions at art school as well. SCAD had them every weekend. The models were always nude though. Sometimes the models here are clothed or in costume.
Its pencil. I dont like charcoal very much. Its way too messy for my sketchbook. It's really nice for rendering large pieces though. Thanks! I agree, the Disney life drawing pictures are my favorites too.