I went to UCF so I'm kinda familiar with the UF Greek system. I'm not 100% sure what each of the fraternities you listed are but I'm going to guess that you visited SAE, Sigma Chi, KA, ATO and Phi Delt. I think Brad might be SAE and Tim might be KA. I could embarrassingly wrong though.
The last time I actually hung out at the UF fraternity houses was my senior year (graduated in '03) when I went to visit some UF friends during Gator Growl. I'm sure the Greek system has changed somewhat since then.