Drinking and Drawing.

So I just paid my tab and left the bar.
During my stay, at the local watering hole, I did a little drawing. Four beers in, I asked for a pen and paper. The inspiration was the fresh pint that had been placed before me, like a relic of ancient times. Looking at it, I saw an expression. Maybe I was projecting. All I know is it said this:
"Drink me or Draw me, like that slut across the bar."

The bartender, John, hung this little bastard on the wall behind the bar.
I got a free pint for it.