Syncing music being played on multiple computers/speakers

Hi, I wasn't entirely sure where to post this, but hopefully someone can help me out. I'm in college. I own a Macbook and a Time Capsule. I want to stream a playlist (while it's being played) to other people's computers so they can play it on their speakers and we can have synchronized music coming from like 6 different rooms at once. I could buy several headphone splitters and run auxiliary audio cables to everyone's speakers, but that's kind of expensive for a college kid. Any suggestions on how to do this? Thanks a lot!

 

No ideas? Alright, no worries. I did find out about Shoutcast through my own research. Does anyone know if I can use my Time Capsule or my actual laptop as a server for it since it's only going to be used by a few people?