Facebook Places launched last August, and since then Facebook has been trying to get people to use it. It's no wonder: ComScore data show that in March, 7.1% of the U.S. population used check-in services on their phones, and when it comes to smartphones, that number jumps to 17.6%.
But Facebook knows it's lagging behind more-popular location-based companies like Foursquare. Foursquare says its doubled its users since Facebook launched "Places."
So, where are people checking into on Facebook Places? Well, seven big U.S. airports, Disneyland, Times Square and, well, Facebook headquarters in Palo Alto, Calif. Think of it for a minute: 700 million global users, and Facebook HQ is among the top 10. But before you assume no one but Facebook employees are using it, Foursquare (9.5 million users) says its top check-in spots are also dominated by airports.
Here's a look at Facebook Places data provided by social-media-software company Wildfire Interactive, which has run more than 100,000 campaigns for clients like Amazon, Ogilvy and Target .