I think Spotify should be available for business use. The client could be tailored for business use and report usage directly to the rights-holder organization of the country in question (e.g.. STIM for Sweden). The current state of affairs, is from my understanding, that if you e.g.. play records as background music in a store, you have to report usage and pay the appropriate fees manually.
This is ridiculous and needs top be fixed.
I can't think of a single valid reason, other than the usual music industry sluggishness, that this is not allowed/encouraged. Should be a nice new market for Spotify to break in to as well. Other than the obvious public markets, like shops and restaurants, there must be lots of businesses were there's a need for music, such as background music for receptions, offices, you name it.
At this time, you cannot use spotify in such a setting, as it would violate the personal license agreement.