Here is a sketch that I did in one of my favorite places. I like to draw in the cafe on the second floor of the 23rd St Barnes & Noble. There are long tables in the center with very harsh lighting depending on where you sit. it is almost like stage lighting and makes it possible to sit pretty far away from people and still see them clearly. This image was painted in gouache on Bogus kraft paper which has a nice tooth to it and takes paint really well.