Oivoy
http://www.oivoy.com/Foursquare for Happenings
We connect people with places they want to be in, in the right moment depending on their tastes and current mood.
A happening can be something that, well, happens in a certain moment whether it is planned or spontaneous.
If a place you may like has a special deal, we'll make sure you know it!
Angel list: https://angel.co/company/oivoy