women must go to every event they are invited to at every house or they will be removed from the process. They have to give everyone a chance and vice versa.
The Panhellenic Formal Recruitment experience at USF lasts one week at the beginning of the Fall semester. There are four days in which women get the opportunity to meet with the chapters. On Spirit Day, the first day of the recruitment process, women will visit every sorority. As Recruitment continues through the second, third, and fourth days, through a mutual selection process, women narrow their choices in finding their ideal home.
For women who did not join a chapter during formal recruitment there are additional opportunities to participate in recruitment activities during the year. Some of the chapters on campus participate in Informal Recruitment during the fall and spring semesters. During Informal Recruitment women attend recruitment events at individual chapters and have the opportunity to join those chapters seeking new members.
Someone earlier mentioned reasons why some schools do not have delayed rush, which is the case at MIT. In addition to hoping that students aren't tainted by stereotypes, there is a concern that numbers would go down if rush happened later.