I think a wonderful addition to the library would be rooms for music practice or rehearsal for small community music groups or individuals to practice music. The library could even house donated pianos and have inexpensive instruments available to loan for use in the rooms like ukuleles. DC lacks community music practice rooms/rehearsal space. Of course, the rooms would need to have thicker walls with soundproofing. I've included a link to a public library that has music instrument rental. It is a great way to reduce the barriers to learning an instrument and it can compliment library materials related to learning about different instruments and music.