[Menace]

Yelp has used its data to come up with city maps showing where people in certain sub categories are likely to be found, i.e. hipster, yuppie, etc.

Maps are available for:
Austin
Boston
Chicago
London
Los Angeles
New York
Paris
Philadelphia
Portland
San Diego
San Francisco
Seattle
Toronto
Washington DC

For example, San Francisco is here: http://www.yelp.com/wordmap/sf

Not sure if this is helpful for game purposes really, but thought it was worth bringing to the collective.