Part of what made Foursquare so much fun, aside from telling everyone where you were, was the ability to claim Mayorship of a specific location, and that has come back to its Swarm app. People would fight over Mayorships, everyone wanted to be Mayor of all the places they visited, and now users can get back to fighting the good fight. Along with bringing the feature back, Foursquare has rolled out some rules for it as well.
The rules are simple: you'll be the Mayor of a place if you've checked in more than anyone else in the last 30 days. Only 1 check-in per day counts and ties go to the reigning mayor. We've been tallying all of your check-ins from the past month, so go see if you've already proven yourself worthy of the Mayor crown at your local spots.
If you are not already using Swarm, you can begin so now by downloading it for free from the Windows Phone Store.