In the interests of enhancing compact cities, some lovely public spaces can be carved out of alleys. It makes for quiet place amid the milieu, and can be the perfect home for those little secret restaurants, artworks, and meeting places that are whispered from the lips of locals in-the-know.
There are lovely, gritty, curious little corners of University Hill in Boulder, Colorado that are perfect for such an effort. Agents from the Poorly Kept Secret Society infiltrated a few of these earlier today. On bicycle, if you must know. Here is a map, and some photos pulled from the Internets:
(Photo from the Denver Post, 2/2007)
Note: these are old photos, but the alleys are pretty much unchanged.