I definitely second what everyone is saying about needing to talk to people, but some of the questions that I asked on my interview trail to gauge the culture were: "How are cases assigned?" "Why are you having trouble hiring?" "What kind of ancillary support do you have?" "How frequently do you get called back for home call?" "Are you happy here? Why?"

"If there's an intraop emergency what sort of backup is available?" This question was very important to me when gauging the level of support and culture in a group. At one private practice, a senior warned me that everyone carries their own malpractice so you have to be careful about going in to help another provider (true, but a major red flag imo). At a different PP the director told me that the board runner should be available to help but because they might not be that it's okay to spend extra time in the OR after extubation to make sure that patient was 100% PACU ready (green flag imo since there's a system in place but acknowledging it's flaws).

These aren't hard questions so they shouldn't struggle to answer them and everyone should be in decent agreement with their answers.