Is it worth asking about the programming environment if you're already in the office and can see evidence of it all around you?
Do you eat lunch together? Is dress always this casual? How often do you refresh your equipment? How often do people work in groups vs solo? Do you encourage working in pairs? How geographically distributed are project teams, typically? Do people take personal calls at their desks? How do you manage shared resources like conference rooms? At my last job, everyone stood up and belted show tunes for a 1/2 hour at tea--do you have such a program?