I have a question about service, one of the three most important parts of getting tenure. I have read through the forum on this, but can't find concrete examples of service types.
A better way to say it is that there are only three formal criteria for tenure at most schools: research, teaching and service (edited to add: obviously grants for some fields).
Further, at most R1s your expected contribution will probably range from 40-40-20 to 50-40-10. So that 10-20%, while not completely unimportant over a six-year span, will definitely pail in comparison to your research productivity and teaching effectiveness.
If you want to ask a knowledgeable question at your interview, ask what types of things assistant professors do for service pre-third-year review. Then during the interview simply demonstrate that you are a pleasant and agreeable person. That should be more than enough to cover any questions about your suitability for service as a potential future colleague.
Good luck!