In many offices it is more common to see workers using Spotify from computer work. In many others, this service is castrated as if many users use the service at a time, may not be negligible consumption of bandwidth that makes this application. As a note to say that although many people do not know, Spotlfy is a P2P service that is a plus download serve music that you heard and that this cached on your computer, and so Soptify not have to deal with all traffic stream and therefore not have to deal with that cost.
For all I and many more, it is likely that in many environments (or even in your own home) is interesting to have a streaming server itself within the local network. For this we use Firefly Media Server (formerly mt-daapd) that uses the DAAP protocol developed by Apple and used by iTunes to share music. The DAPP protocol is not open, because Apple never released, but by reverse engineering has been possible to understand its functioning and develop a compatible implementation.
Besides the DAAP protocol is myduplicateremover.org
supported, apart from iTunes, for a large number of media players, so you can use this service from various platforms.