Foursquare cards are popping up in Google Now, even without the app
 

Google Now has been serving up cards with info from your apps for a while. According to a report in VentureBeat, you might start seeing cards from apps you don't have installed -- starting with Foursquare. Cards with tips from the app were spotted...

http://www.engadget.com/2015/10/30/f...ds-google-now/