Hey to answer your question on my fraternity, Zeta Psi:
we have 50 + chapters, i can't be sure how many exactly sorry, we are expanding right now and i'm not sure the exact, cause i'm not sure how far most are in thier colony status.
Founded: June 1, 1847 (the fraternity in whole)
January 25, 1939 (my chapter)
check npc's website, i can't remember the address but, it's a link off my international headquaters page
http://www.zetapsi.org
Hope this helps
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Edgar A. Hartling
Zulu and Constitution Contact
Zeta Psi Fraternity of North America - Alpha Mu Chapter
Dalhousie University
Halifax, Nova Scotia