Salvation Army

I don't know too much about the salvation army. I have only been there a few times, but i have a pretty good idea of the atmosphere of the place. In my knowledge people go there for good cloths at discount prices. I am looking to interview customers to find out how often they go there or why. I also want to figure out how the store is run and talk to some employees to learn what it is like working there and the kind of people they meet.