The Saturday Night project was started by a group of students at Duke who became involved in sexual violence awareness efforts after one of their friends became a survivor. The project has since spread to other colleges and universities, including Harvard.
Feel free to look at the following links to get a sense of why and how Saturday Night was started, or how it takes shape at other institutions.
Harvard:
http://www.fas.harvard.edu/~osapr/saturdaynight.html
Duke:
http://www.duke.edu/web/saturdaynight/index.html