University of Chicago:
Kappa Alpha Theta has Mr. University
Delta Gamma has Anchor Slam
AOPi sorta picks through different events and has had a pizza pie eating benefit and put on events like MTV's Singled Out
Psi U had Cool legs, Hot buns
AEPi had Lascivious Ball
Fiji had Islands
Other fraternities have parties like graffiti but I think they're just themed parties and not just associated with them at other schools.
Alpha Epsilon Pi:
Our chapter at Mizzou has the nation's largest single fraternity philanthropy called Rock-a-thon.
Our Northwestern chapter has something called Dog Days which involves hot dogs and concerts and a bunch of other fun stuff
http://www.dog-days.org/
And our Indiana chapter evidently has some HUGE formal/party called Hollywood I think. I've never been but I've heard the bill for this is through the roof.
-Rudey