Dance party was an internal hackathon project a while back. It was a big hit. At atlassian connect week we were shown some of the capabilities of hipchat, and I figured we could clean it up and release it as a fun product.
What it does
Uses the spotify APIs to pick a song that matches the beats per minute of an emoticon
How we built it
I also used it as an excuse to get more familiar with kubernetes and building docker images with CI.