Nightler - Find the people. Live the night.
Candidate - A Q&A game to meet new people
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Clocked - Dating matches for city based millennials.
Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
Datezr - Mobile app with quick date ideas based on location