Foursquare help needed!

I need friends!

No, that's not a desperate cry for help (though it could be, if you want it to be).  I need friends for Foursquare!

Back in December, I asked whether people thought I should join Foursquare (no, not the church).  Didn't get a lot of response, and nobody chimed in and said "Cool!  You should!  I'm on it too!"

However, after further thinking about it, I decided to take the plunge and join, just to test it out.

Foursquare: Should I join?

One of the new social networking ideas is something called "Foursquare".  Basically, when you go out to places, you "tag" where you are and you can also leave "tips" on the place's site for what somebody else may want to check out ("Try the new Jumbo Burger.  It's divine").  You can leave "shouts" that announce that you're there and invite others to join you, or just tell people what's going on there.  It's also kind of a game, as people can rise in status and become "mayor" of a certain place if they've visited that place the most often in a two-month time period.  Restaurants, coffee houses and the like actually have given discounts to Foursquare participants who are frequent visitors to their establishments, especially if they become "mayor."  When you announce that you are at a place, anybody on your friends list will see it immediately, and can head there themselves if they want to meet you.

I'm just wondering whether I should take part in this.