Do you Check In? Check In is a way of sharing where you are. Using Foursquare or Facebook, you can check in and tell your friends what you are doing.
Some people want a record of what they were doing at a particular time. And also you can tag your friends at the place. Using Check In makes your life more memorable and special.
At least in Japan, people love taking photos of food and posting them on social networking sites. Some of them have more pictures of their food than their faces.