So I may be WAAAAY late with this one since Europe has had them around for such a long time (since 2006)...but it couldn't hurt for the USA to get one in certain places too (specifically around bar areas), I could name a few places: Adams Morgan, U St., K St., Dupont Circle, H St. NE, every "park" in the middle of the city.
It's a simple concept with a HUGE payback in a good way, the sweet smell of regular air, not one that someones been urinating on all night long would be a GREAT way to start the day wouldn't it?
