Do you prefer to work in a physiotherapy setting or a spa setting?

Most likely, you had already considered this beforehand when deciding which training program you were most interested in. Take into account the role being offered; if it leans more toward being a physiotherapist, then, by all means, state your preference for it. The interviewer is trying to assess if you're the best fit for the job, so make sure your answers are tailored to what is required in the job description.