Back in June 2011 I broke a story about Google's new "City Pages" which I discovered a couple days before Google officially announced them. Now it looks like they are all gone and the ones I have checked go to 404 error pages.
I've been collecting Official Google+ City Pages as I find them and have listing the ones I've found so far. If you live/work in a particular city you may want to circle the page, comment on posts and get to know the local Community Manager. Having friends in high Google Local places never hurts!