Thorough questioning, and then a breakdown of how the gym works and the responsibilities of a trainer. Thereafter there was a "trial shift" - which I feel is a great way to assess the 'fit' and likelihood of success and satisfaction for both employer and interviewee

Fun and easy. Must be upbeat and motivating. Sales is also a very large part of the job. No Star questions involved. Just personal one on one with the owner who is really cool and down to earth.