Dateable - Bay Area’s dating site
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Double - Tinder for double dates
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Lyst - Search thousands of stores in one place.
Bigtent - BigTent is a web-based organization and communication portal for groups.