Unless you like constantly repeating the same words multiple times a day, then this is the job for you. Be prepared to present the same membership in the same format to new people interested and report to unprofessional managers. Also you have to clean every few hours.
Seriously. It pays the bills.... the minor ones at least. The only true upside to this place is that they're honestly so understanding of school and life schedules. As long as you do your job, they will give you a schedule that works around your needs. Also, the easiest customer service job ever. And I've been in the field for a millennium.
Working at Planet Fitness has been, so far, the most rewarding job that I have ever had. During my time there, I was able to gain confidence to work out, both mentally and physically, something that I was too insecure and scared to do prior to working there. I also learned self discipline, and I am grateful for the time that I was given to work there :)