Nobody else grow up on tuna casserole?
I don't know the exact recipe, but it was basically canned tuna, frozen mixed vegetables (diced carrots, corn, peas, and Lima beans was the favorite in my house), and macaroni and chees. This all goes into a casserole dish and is cooked somehow (probably overn, I don't know, child me didn't worry about such trivialities). The crumbles at the end of a bag of ruffles would be sprinkled over the top of this before baking to add a bit of crunch.
I couldn't count how many times we ate this growing up. It's been a few decades, and the nostalgia is real, but I still have no inclination to make it for myself. If lower middle class had a flavor it's that mélange of canned tuna, fake cheese, and lima beans.
You want mpd to server and play the music, connected with a web front end (there are a few to choose from) accessible on the private store wifi. You should probably serve this frontend only to a certain machine on the network (like the managers computer in the back) and lock everything else out. The last time I ripped CDs on Linux I used whipper, which I believe was the successor to morituri. This is all only legal if the CDs they have already included the licensing fees to play them publicly or are themselves freely licensed. There are sources of freely licensed music out there that you can play publicly without paying.