<p>For MIT, the percentage of men who join fraternities is 55% and the percentage of women who join sororities is 26%, according to College Board (which sounds about right to me). Just to add another data point.</p>
<p>I’m not sure that numbers are the be-all, end-all of “dominance”, especially since I would hardly call MIT “dominated” by the Greek scene. A school can have few Greeks, but the Greeks throw all the social events and everyone wants to be around them. A school can have many Greeks, but have many popular social events thrown by and social scenes dominated by non-Greeks. A school can have many Greeks, but not necessarily have a cohesive Greek community with a unified social scene. A school can have one major social scene - Greek or non-Greek - or it can have many vibrant ones.</p>