The People's Republic of Chicago
Googling for "rain barrel," I found this:
For Chicago residents it's not so much the best place as the best time. That is to say, the City of Chicago will several times over the course of a year, sell rain barrels and Earth Machine "rat proof" composters for less than half the amount one would spend at a green store. Be sure to bring your drivers license as they will check for residency.
Definitely "the city that works"!
And gawd knows, we all need [cities that] work!