fraternities

I am a fraternity man.Going off the three you listed... If you like to party and strictly party then SAE would probably be best, but I am pretty sure they can't rush anyone because they don;t have enough people to technically be a chapter right now. Sigma Pi parties alot and are more of your meat head workout type. As far as I know they have great parties, but are stereotyped as tools overall. Pi Kapp is more of the well rounded. They have some big parties, lots of kick backs, but overall they are more involved with the campus and not as focused on partying as much as the other two names listed above. Other fraternities I would suggest checking out included Phi Kappa Tau and Kappa Sigma as they have two more party oriented houses due to their location being in not so nice neighborhoods. All in all just go talk to the fraternities at Greek Week of Welcome... You can get a better sense of who to rush by that.

Don't rush Phi Tau, they're a bunch of tools.

Go FIJI they are great

SAE and Kappa Sig are my two favorite fraternities...you can't go wrong with either one