This solution lets you play audio at multiple locations.
Multi Room Audio Player is a multimedia software which allows you to use and manage multiple audio streams. These audio streams could be played in different zones of a space, different rooms of a building or shopping mall, etc. Thus, when a central audio control center in places such as nightclubs and other public venues with multiple rooms in which music is played, is required this is a useful tool. You can control the individual audio playback, its volume, etc. Individual controls of play, pause, stop, forward or reverse is made available. Details of the track being played, volume levels of playback and volume control are available for each area. Each channel of each available soundcard can be used to play a separate audio stream. Thus individual machines at these different locations are not necessary.
The program gives you access to a 12 band equalizer that can be set individually to set the mood at each of the locations. The tool provides support for a large number of music formats as well as playlists. While this tool is meant for people who manage music playing at businesses, one could buy a cheaper version for personal use that will let music be played at different rooms based on different playlists for example. This has a simple interface and is quite intuitive. Most users would be able to get productive very quickly. The controls are also well laid out. The controls are intuitive so that most users will be able to figure out what to do and how to do it. This is a very good product. If you are looking for a similar solution, this is a good candidate for a trial in your exact set up.