I worked at University of Missouri part-time (More than a year)
Flexible Hours. Able to do homework during your work hours. Above minimum wage pay.
Wish I was able to work more hours
I applied through college or university. The process took 2+ months. I interviewed at University of Missouri (Columbia, MO) in March 2011.
You go through group training first, which is basically a test to see how sociable you can be. My advice is to just be friendly and outgoing during the meetings, they're easy enough to get through.
Afterwards, you interview with specific Hall Coordinators, This is a standard process, but most HCs will only hire candidates they have interviewed personally, so pick your hall carefully.