The interview isn’t over until you’re all the way out of sight and in your car and far from the building (and, conversely, starts the moment you’re in your car). The last minutes of the interview could be what push you past an unseen candidate who’s in a neck-and-neck battle for the job with you.
Show genuine interest in the workplace, the culture, and use ending remarks to demonstrate that you’d be a great coworker. I always use this time to ask if I can address any concerns the interviewers might have with my candidacy and that’s often a great move (it shows that you’re both considerate and confident).
Best Interview Tip: Make sure to collect contact information right at the near-end of the interview, and follow up! Be sure to thank your interviewer for taking the time to review your candidacy.