Airbnb - Book unique places to stay and things to do.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Nightout - The standard in event ticketing and marketing by NIGHTOUT
Event Hunt - Startups and Tech Events Curated By Locals
TickPick - Purchase tickets to your favorite events with no hidden fees
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets