I didn't even realize it was an interview! I had sent them my resume via email and was told a day later that there were no openings but would keep me in mind should one become available and they'd reach out to schedule an interview. A few days later I went in for a cake during my lunch break and introduced myself. We had a very brief conversation about my views on the company and was given an offer right away.

It was casual, she took me back towards where they bake the cakes and stuff, in my opinion it should have taken place in a private office, she asked all the basic questions, where did you last work, do you have any experience ect.