PartyUP - See videos from the best nightlife venues in your city.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
clubbookers - Looking for the best night clubs in the world? Book your VIP table at the top night life venues on the globe through Club Bookers.
Bigtent - BigTent is a web-based organization and communication portal for groups.