Alright.. I'll bite..
From my research, I have found the following groups have collegiate chapters in Houston..
Alpha Gamma Delta
Phi Mu
Alpha Chi Omega
Sigma Sigma Sigma
Delta Zeta
Delta Gamma
Chi Omega
Zeta Tau Alpha
Alpha Omicron Pi
Is it one of these? I have my own guess, but I shall keep it quiet for now
**I missed Alpha Xi Delta somehow, but I am adding it now