A few years ago I started asking the interviewer this question:
"I'm always looking to learn new things. Given what you've seen of my resume', what new things could I learn here?"
I sincerely wanted/want to know this but I discovered that there was an unintended side benefit: In response to this question, the interviewer often tries to "sell" you on the company which changes the dynamic. Instead of you trying to please the interviewer, the interviewer is now trying to please you instead - or at least it seemed that way to me.