I've never used it, but I know Yelp has one (http://www.yelp.com/developers/documentation/neighborhood_api http://www.yelp.com/developers/documentation/neighbor

I've never used it, but I know Yelp has one (http://www.yelp.com/developers/documentation/neighborhood_api http://www.yelp.com/developers/documentation/neighborhood_ap...).