Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Flock Trips - Bachelor parties planned, organized, and squared away
Palaround - Meet people you should be friends with.
Clearbit for Slack - Send all signups directly to a Slack channel
Babble - A more personalized social network
Party On Demand - Have a party delivered to your door in 60 mins or less.