Pretty nifty little thing he's got going here.
Photoshop Insider Blog By Scott Kelby » Blog Archive » It’s Official: Announcing My 2nd Annual Worldwide PhotoWalk!

It's July 18th so if you want to meet new people, sign up! It sounds like it should be a lot of fun.

Here's the link to sign up
Scott Kelby's Second Annual Worldwide Photo Walk | Scott Kelby's Worldwide Photo Walk

Closest one on my side of the bay is Dunedin. Can't get any closer than that