Largest # of NPC Sorority Colonizations

[AZTheta]

Oh! Oh! I knew this b/c I had to learn it when I was a pledge:

University of California at Santa Barbara, seven NPCs colonized in 1950 when the campus opened up to NPC sororities (there were locals prior to this):

Alpha Delta Pi
Alpha Phi
Delta Gamma
Kappa Alpha Theta
Pi Beta Phi
Sigma Kappa
Chi Omega