Technologies like FourSquare offer people so many wonderful things to do to kill time while on the bus, sitting in class or in a meeting. You can become the Mayor of your fav hangout and earn badges along the way - all the while promoting your coolness to your friends. Yes, there is functionality too, like being able to find out some decent places that other go to that you may not know about.
The interesting thing about this game are the games that can spring up within the game. Recently, my office started a trend of 'Microlocations' (credit @edlynne). So instead of trying to become the Mayor of Syncapse, there is a flurry of activity where people are trying to become the Mayor of locations within the offices of Syncapse. I currently hold the title of Mayor of both the Finance/PR Office as well as Stall #2 in the Men's Washroom. Holding these Mayoral ships will be a challenge and is a wonderful work diversion. I have to note that Hemesh B is currently the Mayor of my office.
Some would say this is a total diversion from work, but I see it as a wonderful reason to go and say hello to fellow co-workers and get my nose out of laptop. I think this trend will continue, and go even more mirco with people becoming Mayor of square meters in specific locations (the second cement brick north of the crosswalk on the way into the Eaton Centre). Hopefully it will just help bring people together for their shared love of that place on earth.
Another trend is becoming Mayor of state's of mind or feeling (credit @pcrowe) - becoming the Mayor of 'Hungover' or the Mayor of 'Happy'. This will be much more difficult to compete against (plus the location angle makes it a little less relevant) but nonetheless, it is quite existential. I can't image trying to retain a Mayoralship of Happy.
So join in, play the game, and try to unseat me from my throne at Syncapse!