Can't imagine a whole room of them, but I did have the pleasure of hearing this sound at the InfoAge museum in New Jersey. Wondering the building at the vintage computer fest last year I heard the clacking and poked my head into the room and ended up having a pleasant conversation with a man restoring the equipment

I asked where he learned to repair them and he simply said, I have one that works, and one that doesn't work, so I'm just going through and finding out what's different

Here's a short clip I took of the restoration in progress:

https://youtu.be/Oiq20VWskmM