They're very vocal about the fact that they're doing everything they can to place everyone. But girls often drop out of the process when they don't get into the house they want. Some schools have a good social scene outside of greek life. Rush there is strictly regulated, and no parties or alcohol are allowed during rush. They go into a rush looking for the people that will bring something into the fraternity or sorority.
Some people just have the wrong impression of the greek system.
We're not an exclusive bunch of snobs, we are not a bunch of lazy drunks. What we are, however, are a group of people that provide sevice to our community, raise money for charities, promote good grades and good attitudes. The greek system is for those who want to get involved, but are already involved some way on campus. Who wants to go to a party and have some fuck from the wrong side of the row lurking on your woman. The selection process is not always perfect, but the right fraternities and sororities on campus usually have a pretty pure strain of people.