MSN Healthcare Solutions interview questions

I came to an open interview by invitation of a staffing agency. The interview appeared to have way too many applicants and I was advised by others that this supposed job fair was a free for all i.e. free to the public. The process was confusing and unorganized. It was explained to me that this was not the first day of open interviews, the interviewers seemed detached and I couldn't imagine how they could possibly keep up with all the faces they were seeing. The experience seemed unprofitable and I left with the feeling that I had just wasted my time and resources showing up.