Enthusiasm for the members and the format
Presence / confidence
Very clear instruction
Clear communication of the purpose of the class
When launching a totally new format, represent it in the best way possible, so that people have a good idea of what it’s about. Some will like it. Others won’t. Some new people will try it. It will build on its own over time.
When I have started or sub for group fitness classes, it is important for them to know what to expect from the class, especially if it is one that I have designed. When I sub it is helpful to talk to the classses current instructor to get a feel for the format and class members.
Either way I kindly let them know it is my way, very nice though, expect to have some fun and when the music starts….