Technically, the facility that you are teaching at is responsible for a music license if it's a dance studio, gym, etc., so most of you will not have to worry about it if you don't own a facility. Non-profits, religious organizations, and any educational/treatment venues where you directly are not making large amounts of money from the class are typically covered under The Fair Use Act. Here is an article from Yoga Alliance about licensing, most applicable if you do run a business:
For many facilitators, having a malpractice insurance policy that covers movement work offers extra piece of mind. The policy that Dr. Jamie recommends for facilitators is through Massage Magazine. The policy is very comprehensive and also covers yoga and reiki. Obtaining this coverage is strictly your decision. If you are sharing the practice in a facility like a treatment center or in some form of ministry, chances are your work with sharing Dancing Mindfulness in these venues would already be covered (although it's a good safe guard to double check). You do not need to provide any verification of training to purchase this yearly policy. Read more about the policy by clicking HERE.