That's like saying “Are there questions I should ask on a first date?”
Try to remember this is all about people.
You are trying to show them you are a normal, regular person that they could work with.
So, all the regular rules apply. You want to actively listen, ask insightful follow-up questions, be present/noticeable but also not hog/dominate the conversation, etc.
Basically, go in, learn, be genuine, and behave as you would with any other social gathering/event!