Jukely - Go to hundreds of concerts for one monthly fee 💃
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
TicketHarbor - The safer Craigslist for P2P ticket exchanges
Event Hunt - Startups and Tech Events Curated By Locals
Nightout - The standard in event ticketing and marketing by NIGHTOUT
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets