I arrived on time but waited ten minutes for the hiring manager (or whatever position she held) to be ready. My interview lasted an hour long. One hour! She kept interrupting to go help a customer or to wave hi/bye to co-workers passing by. And when she came back to the interview, she'd ask the previous question again. And I had to repeat my answer, again. I should have walked out during the role playing portion... while she was helping another customer---again! This was the most unprofessional interview I have ever attended!

Well it was very casual. Asked for basic information on past experience and education. Asked if I was comfortable handing money and interacting with customers. Very easy and similar to what you would expect from a retail position