I have a service business, and one of my clients is a used records, books, cds, dvds, etc. We do a lot of trade work (instead of cash). The wife and I have a room we call "the library" - all of the shelves are mostly overstuffed (double-stacked and two-deep).

Also, while working at the client after hours, they showed me how to open the security cases so I can sample whatever audio I want on the store system - Makes the environment much nicer.