Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Madsounds - It’s like Discover Weekly, but daily.
Facebook Local - Discover places to go and events happening near you
Pyro - Spotify music voting for parties
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
MisterJack - Make and share playlists