you should take this as the time to get to know the person interviewing you a little more. Starbucks places an emphasis on making connections with customers and partners (this is what Starbucks calls their employees). Think of this as an opportunity to do just that and to leave a lasting impression on the person conducting the interview. ask how long they have worked at the company if they have not told you already and about their "journey" with the company. If possible you should reciprocate any relevant questions so that you are not the only person talking the entire time. This is an interview in which it would be beneficial to take a more "friendly" and "familiar" approach while still being "formal".