I have trouble believing that commercial venues make the majority of the plays on Spotify.
Most venues don't want to spend time carefully selecting music when they could instead be focusing on customer service.
[Edit] just read the earlier sibling comment. I'm informing my theory based on my own very occasional usage of spotify. I suspect I'm in the long tail of their business, and I would imagine that the aggregate of businesses that play spotify all day matches up with a good portion of that long tail.