First, I made some small changes to the drawing. I wanted to better repeat the design of the tapers coming off the letters below behind the pint glass. Once I was happy with the drawing, a wash of liquin and yellow ochre goes on.
Then the burnt sienna underpainting. Even though this will be a largely blue painting, I still start with the burnt sienna to layer warmth into the painting. It also makes it easy to see guidelines as the layers of colors build.
Here is the first layer of the blue/gray background. 
Next up will be the first layer of paint for the pint glass and blue in the lettering.
