I was browsing random stuff on Spotify the other day and found some really relaxing music. Just the best music to listen to while chugging along at work. Eventually I looked at the album name... It was literally waiting room/elevator music.
You should check out brain.fm
The whole site is basically non vocal. Music, but it's engineered to get you to focus. When I first saw it, I assumed it was just some gimmicky way to advertise, but I swear it actually helps me to focus better.
But yeah. Sounds like you'd enjoy the music they provide.