We seem to have a lot of GLO's with sigma or delta in them at my school:
Alpha Gamma DELTA
Alpha Xi DELTA
DELTA Zeta
Alpha SIGMA Tau
SIGMA SIGMA SIGMA
SIGMA Kappa
SIGMA Nu Phi (local)
Phi SIGMA SIGMA
SIGMA DELTA Tau
SIGMA Phi Epsilon
SIGMA Nu
Phi SIGMA Kappa
Phi SIGMA Phi
DELTASIGMA Phi
SIGMA Tau Gamma
DELTA Tau DELTA
then there's the rest of them
Lambda Chi Alpha
Kappa Phi Alpha (local)
Tau Kappa Epsilon
Arm of Honor (local)