Just to provide a continued example to stabilize the previous info. Most college fraternities do have a "Mild" connection to masonry. As someone who
has studied copies of dozens of different fraternities rituals it is apparant that there is a resounding similarity between the said rituals and the
masonic degrees. The reason for this similarity exisits because most fraternities when trying to form their ritual early on utilized members who were
also master masons. These brothers in turn would draw upon their experiences as masons to help shape their groups ritual. Its all they had to work
with back in the day for reference. I am not aware of any organization that is a so called "feeder" group for freemasonry. As far as I know
freemasonry's own recruitment restrictions wouldnt allow for it.
As far as Sigma Chi and everyone else goes for that matter, no individual groups ritual is perfectly secret. There will always be someone who is
initiated, and then gets ticked off and leaves and in turn creates a leak for the info. Either that or someone gets to drunk at the bar and blabs to
the girl he is with

Either way the stories about it being the best kept secret next to the formula for Coke, and that President So-and-So snuck
into the library of congress and removed the only copy, are all stories told to pledges to help them realize the importance of keeping the info
secret.
Sorry to bust the conspiratorial bubble here but that really is pretty much what its all about.
PS The thing about joining and getting rich aint that grand either. Im still starving at the end of every month!