frats and sorities

SAE: Gphi, DG, Kappa
DU: Kappa, DG, AXO
Ksig: Kappa, Gphi, AXO
Sig Chi: DG, Kappa, Aphi
Sig Ep: PiPhi, DG, Kappa
FIJI: Aphi, Kappa, Gphi
OX: Aphi, DG, AXO
Lodge: Aphi, PiPhi

This is just what I've noticed. A lot of it is based off who you were humo pairs with your freshman year-cuz you spend a ton of time with them and usually make friends with that sorority's freshmen.

pretty good rule of thumb:
You can find any girl from any top tier sorority at any Ksig, SAE, Sig Chi, DU and Sig ep party. There are also girls from every single sorority at most of these parties

Both FIJI and Theta Chi have girls from top tier sororities at their parties, however, most the girls at the parties are from upper middle/middle sororities (APhi, AXO, PiPhi)

You would not find any girls in Kappa Gphi or DG at a lodge, pike or chi phi party. For these parties, there are some middle tier girls but most of the girls are the parties are theta or tridelt.