I never used the original app, but use the new FourSquare for discovering food after Yelp grew increasingly anti-user (both consumers and businesses). Makes me cynically wonder how FourSquare is screwing us over.
For a while now, friends and family have been relying on me for restaurant recommendations whenever they travel. Foursquare is my starting place and I then use Infatuation and Yelp written reviews (not their star ratings) to narrow things down.