Foursquare for iPhone has been updated to version 5.3.3 that brings new rating system for places. When you search for places you can see the scores on a scale of 1 to 10 next to the name of the place to show how popular it is. These scores are based on Foursquare tips, likes, dislikes, popularity, loyalty, local expertise and check-ins.
Download Foursquare for iPhone from the Apple iTunes Store for free if you have not downloaded the app yet. These scores are also available for Foursquare Web app. Hope it would be available for Android and BlackBerry apps in the next update soon.