Drinking & Drawing : Beer Induced Drawings On Coasters At Boscos (Overton Square, Memphis TN).
(1) Order a fabulously dark, stout beer
(2) Strip off the printed layer of the coaster
(3) Drink a bit...
(4) Draw a bit...
(5) Repeat 3 & 4 until the drawing is complete or until you desire another libation, then repeat the whole deal.
(Check more out on flickr by clicking here.)