[SigEpYoda]

Sorority:
That is a hard one. I belive Phi Sigma Sigma is the biggest with AEPhi and SDT very very close behind them.

Fraternity:
1. Sigma Phi Epsilon
2. Tau Kappa Epsilon
3. Sigma Tau Gamma
4. Phi Kappa Tau
5. Phi Sigma Kappa