My newest game obsession is a Facebook app called SongPop. The way it works is this: you (or your opponent, depending on whose turn it is) choose a category; a snippet of a song plays, and you choose the correct song or artist from the four choices provided (a total of five times per game). Simple, but sometimes challenging.

This game is interesting to me on a number of levels. It’s fun seeing what songs and artists and genres my Facebook friends are most familiar with. It’s fun s...