I was in the Apple store on the Promenade last week, which has a theater area towards the back. They happened to have someone giving tips on how to use an iPhone 4. Thought there wasn't much to learn here since I've had my iPhone for about half a year now, but fortunately I still paid attention because I picked up a neat feature of the Yelp App. If you open up the Yelp app and move to the 'Nearby' category, there is a button labeled 'Monocle' in the top right which when clicked will show you distance and ratings for categories of restaurants, bars, friends, and everything in whichever direction you point your phone.

From my balcony, pointed towards the Promenade: