It is a lovely French word. We Americans like to use French words in our English sentences sometimes. We feel it makes us sound sophisticated.
Ironically, we also like to make jokes about the French being pansies.
Honestly, behind it all, Americans really, really love the French. So much, that they are embarrassed to admit it, and so they make fun of them to cover. Kind of like that girl you teased mercilessly in middle school, you really had a huge crush on her, and by teasing her you were able to interact with her and get her to notice you without letting your buddies or her know that you were hopelessly in love with her.
... oh yeah, a minuet, it is a style of ballroom dance, or the music associated with it.
EDIT: Chalts beat me too it. Serves me right for being so long winded all the time.