questions to ask at an interview?

not sure where this goes in student doctor, but what types of questions do people ask schools at interviews? I know at the end, the interviewer asks if you have any questions, and I know it's always good to have some questions prepared. At one, I asked if there were any groups or organizations associated with the dental school that students often enjoyed or found helpful. I got a response along the lines of "you won't have time for that kind of stuff Ms. ________ ." so apparently that wasn't appropriate, although a friend of mine asked that question and got a friendly response. anyway, any question ideas or sites i can find good ideas? suggestions are appreciated!!!!