John
Thanks -- and thanks to everyone for a great thread.
In the end, 2 of the couples brought toddlers and babies, so it might have been hard to hear a marching band in the middle of the house.
Then, in the mad rush to clean up, I misplaced the 3 or 4 CDs I had put aside following these suggestions.
In the end, it was a sunny day and everyone seemed in a pretty good mood, and I somehow ended up putting on Brother Jack McDuff for an upbeat, slightly retro quirky and no lyrics vibe, although very softly in the background.
So I am not even sure anyone noticed, but please do continue suggestions for future lunches and dinners!