Interesting audio-visual piece by Fred Conrad of the NYT. He catalogs the different tribes in New York City. LDS missionaries, Goths, Sand Hogs, Messengers, and I hope there is more to come.
Wonder what the tribes of Silicon Valley would look like, geeks, hackers, artists, venture capitalists, ...
Tribe (from the Merriam-Webster online )
Etymology: Middle English, from Latin tribus, a division of the Roman people, tribe
1 a : a social group comprising numerous families, clans, or generations together with slaves, dependents, or adopted strangers b : a political division of the Roman people orig. representing one of the three original tribes of ancient Rome c : PHYLE
2 : a group of persons having a common character, occupation, or interest
3 : a category of taxonomic classification ranking below a subfamily; also : a natural group irrespective of taxonomic rank