I applied in-person. The process took 1+ week. I interviewed at 24 Hour Fitness (Sacramento, CA) in Apr 2011
Interview
interview and then had to complete a week end workshop that covers group exercise presentation . Once completed manager has you perform and then team teach with a veteran instructors
I applied through an employee referral. The process took 3 weeks. I interviewed at 24 Hour Fitness (Reno, NV) in Dec 2015
Interview
Application first, then email communication, interview with tryout. I dealt directly with the management, and I was offered the job via email. I was given an in by a current employee's referral. It was all pretty straightforward, and I only subbed classes for the first three months.