We used to do the license plate game. You would get 1 point for each US state plate, 2 points for a foreign plate (incl. each Canadian province and Mexican state). No repeating - once someone called a state, that was it. (To avoid people saying, say, "New York" - "New York" - "New York" and racking up points)
Someone in a fraternity whose house was near my dorm was from Alaska, and had the car tags to prove it. So I always knew to shout out "Alaska!" when passing their house
