This shopkeeper read a few (non-academic) books on Game Theory including Beautiful Mind, which is technically not on Game Theory but a biography of Nash, and he is not a fan of the film adaptation.
Nevertheless, the following sequence from the film "Beautiful Mind" does have dramatic effects. Other than the 'Prisoner's Dilemma', one other illustration of Game Theory, can be seen in this 'Blonde Conundrum' scene below.
He particularly finds the phase inspirational: "Adam Smith... Incomplete. Because the best result will come when everyone in the group doing what is best for himself, AND THE GROUP."
Separately and closer to home, this shopkeeper has long thought that the design of Singapore's COE system is an application of Game Theory