Air - Moon Safari
Thievery Corporation - Mirror Conspiracy (or almost anything else on ESL Music)
I have a goofy cookbook "Win Her With Dinner" -- actually pretty good -- that has music suggestions for dinner in. Someone compiled the list
. Is this cheating? Not if you already own 25% of the music
Edit: Of course, "mood music" can be a tricky thing to pull off. It's an easy moment in the evening to look like you're trying too hard, though that can be charming if this is a girl you know well.