Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Slackbox - Spotify playlist collaboration through Slack
PartyWith - Connecting people who love to party - anytime, anywhere.
Brain.fm - Music designed for the brain to enhance focus, relaxation, meditation, naps and sleep within 10 - 15 minutes of use.
Party Play - Introducing Party Play. One playlist for multiple users.
SoundCloud - Enjoy music & follow favourite artists