Ability to check into locations so not only are we able to see people near us, but people who have been at specific locations.

So let’s say I go to the gym, I check in. Then when I leave, I don’t have to be right there. People who come visit later, can then search “people who been here” or “people who checked in”… this would be great for people who travel a lot, or move around a lot, it also removes the “near me” idea.