3rd entry for Feb 6, 2014

The top one is a 10-minute study with some added shading, and the lower three are a 10-minute and two 15-minute studies.
The top one was a drawing challenge, where the organisers gave everyone their choice of Crayola crayon to interpret the pose. Sketchy's sessions include optional challenge drawings as contests for drinks or other swag, with the results chosen by audience applause or the model's preference.
All are on 18 x 24" sheets of  Canson XL drawing paper. The lower three are Pitt calligraphy point pens; as they start to run out a bit I found they gave a mid-tone on the paper that allowed for some more varied shading, not as in-your-face as all black-line rendering.