What is 3-card Monte in the play, Topdog/Underdog?

3-card Monte is a game that is played to hustle unsuspecting folks out of their money. The game is usually played by a dealer and a team of other facilitators. Lincoln used to be a master dealer at 3-card Monte, but when Lonny, one of his team members, was shot, Lincoln swore that he would never hustle cards again.