By placing lines at various distances from one another, the image gets more structure and gives the illusion of a body. A variation in width gives more dimension to the image and illustrates a sense of realism.
I love the combination of the wine and the saxophone in this poster. This is a great example of a minimalist design with a double meaning. The saxophone represents the "Jazz & Blues" and the Pouring wine represents the winery where the even is being held.