On a related note to DGMarie's post--
I have a yearbook for Univ of So Cal from 1947
In 1947, we had the following NPC groups:
AXO
ADPi
AEPhi
AGD
AOII
APhi
XO
DDD
DG
DZ
GPhiB
KAT
KD
KKG (new in 1947)
Phi Mu
Phi Sigma Sigma
Pi Phi
ZTA
Now it appears each house had less than 75 members.
When I was at USC in the late 80s we had the following houses, but all were 100-140 members, more or less, except one group, who had about 11 members and folded while I was in school.
AXO
AOII
ADPi
APhi
XO
DDD
DG
GPhiB
KAT
KKG
PiPhi
SK chartered in 1988
AGD closed in 1986-87 school year.
The newest chapter at USC is Kappa, chartered in 1947. Talk about a hard campus to be a newbie on.
Now of the 12 groups including SK charter, only 9 remain, but houses are at 150-200...
So seems like there's roughly the same amount in the Greek System but in fewer houses. I know USC needs at least one more house to make pledge classes manageable.
Lauradav could weigh in on that situation, for sure.