That's a good example of a Bukowski drawing. I say that because he often scribbled or did quick, easy paintings, but in this drawing you can see the use of perspective, and compacting the information he wants to get across into a small available space.
This is more difficult than it looks (kind of like writing "simple" poetry) which suggests either a learned skill or an innate knowledge of how to place elements on a page. You can see this in some of his drawings and paintings. Nice.