I recently attended the 2016 conference on Recommender Systems at MIT with my Foursquare coworkers Stephanie Yang and Enrique Cruz. We had several contributions - 2 posters and a 20 minute industry talk on Marsbot.
Marsbot is a character in your pocket that acts as a text-based service for local recommendations. I've been working on it for a while, and we were able to do a full launch a couple months ago. I have so much to say about this project and I hope to expand on it more on this blog soon!
For now, a bunch of people have asked me to post slides from my talk at RecSys so I will post them here. I hope the video of the talk become available soon.PDF of the slides:recsys-marsbot-presentation