Pitt has put tons of old documents and pictures online, including it's yearbook, "The Owl" from years 1907-1980.
There are pages for fraternities and sororities and it's pretty cool to go back to the turn of the century editions and see the very beginnings of groups that have been on Pitt's campus ever since (and also groups that have come and gone!).
The link below will take you to the main Documenting Pitt page and "The Owl" is located on the right side.
http://digital.library.pitt.edu/d/documentingpitt/
ETA: If you go to the '50s, there are full page glamour shots for the fraternity sweethearts!