Here's a quick little study of a recliner chair at night, painted in black and white gouache on a Moleskine pocket sketchbook.
The sketch is about 2x4 inches. This is a fun way to sketch for a moody, film noir look. The paper isn't really made for water media. It has a smooth surface that resists the water at first. The painting is mainly transparent black gouache applied with a half inch flat brush. I used white gouache at the end mainly for the light, the open book on the chair, and the coffee table in front.
Thanks, Paul Tobin and WCW'ers, for the sketchbook. I'm putting it to use!