Here's a game I'd like to suggest.
Just to prove the incredible amount of useless information we store.

The idea would be to link movies/songs/tv series/books (I would limit it to those four), by crossed allusions/trivia.

For example:
I go: Henderson the Rain King has a song by the Counting Crows in its honor.
And then someone goes: The Counting Crows have another song, Mrs. Potter's Lullaby, for the actress Monica Potter.
And now a third person should go, linking Monica Potter (movie factoid) to a factoid of one of the other three genres.

Wanna try? It might be too complicated, but it'd love to try it out...

So anyway...

The Counting Crows have another song, Mrs. Potter's Lullaby, for the actress Monica Potter.