We all have those moments in life when we have to be in the office but we’d rather be drinking in a bar. Well, back in 1974, some engineers at the U.S. Department of Agriculture Forest Service dealt with this dilemma by creating a very cool, architecturally sound, pattern coded chart for the construction of classic cocktails. Dunno about you, but we have newfound respect for the Forest Service. (Hat tip to First We Feast.)

Zoom in on this image (courtesy of a government website!) here.