Although joining ZIN is not a necessary condition to become a Zumba coach, it is very beneficial to become a formal Zumba coach. By joining ZIN, the coach will get official certification and support, get official music and dance videos of Zumba, and have the opportunity to participate in training and seminars organized by Zumba.
Besides, joining ZIN can also give you opportunities to show your teaching qualifications and promote yourself in Zumba official website. Therefore, although it is not necessary, joining ZIN is very beneficial to become an recognized Zumba coach.