This should be fun...
1) They take you to a restaurant you have never heard of, in a part of town that you normally wouldn't venture into.
2) You recommend a really trendy restaurant and they look at you like you grew a second head.
3) You try to take them to Olive Garden and they threaten to break up with you.
4) They have a cookbook on their nightstand.
5) If you take them out for dinner and a movie, they don't care a whit about the movie.