Nightler - Find the people. Live the night.
Event Hunt - Startups and Tech Events Curated By Locals
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Facebook Local - Discover places to go and events happening near you
Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
Eventjoy - The Easiest Way To Organize An Event