80% of fraternity and sorority members in this country are binge drinkers, according to a 2000 Harvard study

http://www.nytimes.com/2012/04/15/education/edlife/a-hazing-at-cornell.html?_r=1&pagewanted=all 

[snippets]

80% of fraternity and sorority members in this country are binge drinkers, according to a 2000 Harvard study.

As a condition of that settlement, S.A.E. officials agreed to post on their Web site every case in which a local chapter was put on probation, suspended or expelled by universities from 2007 to 2011. In five years, disciplinary action has been taken against nearly 80 of S.A.E.’s 223 chapters.

At least two national fraternities, Phi Delta Theta and Phi Kappa Sigma, have mandated that all their chapter houses be alcohol free. It makes a big difference, said James Favor, president of James R. Favor & Company, which sells insurance to 15 national fraternities. In the decade before Phi Delta Theta became alcohol free, the fraternity averaged 12.3 liability claims a year that paid out an average of $812,951 in settlements, Mr. Favor said. After the fraternity went dry in 2000, there were three claims a year at an average annual cost of $15,388.