based on who hangs with who

Fraternities
1: Sig Chi, Pike, Beta Sig, D Chi, SAE, DSig, Sammy
2: Lambda, ATO, TKE, Acacia, DTD
3. Sig Ep, AEPi, Sig Pi
4.TDX, DU, Zeta Psi, Phi Psi, Phi Who
5. PKT, AGR, Alpha Sig, Far sig, Pilamb, Fiji, Beta
6. DKE, Sig Nu, Sig Tau
7. AXP, chi phi, akl, skulls, Kappa Sig
8.Theta Chi, Mud house, tree house
9: Triangle, ZBT