Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Party On Demand - Have a party delivered to your door in 60 mins or less.
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Party Bot - A bot that helps find the best parties happening near you.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.