Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
PartyWith - Connecting people who love to party - anytime, anywhere.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Soulpicks - Discover places loved by friends and experts
Bylde - Bylde is a SaaS platform you can use to Start, Manage and Grow your groups and communities.
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.