I don't know what is the biggest. Diva's pole dancing is quite big and professional enough. It depends on your choice. I studied in Diva, and other schools are also good, but they are too commercialized. When I went to class, a group of customer service tried to fool me. I don't like that feeling. After coming to Diva, Mr. Wu Di asked me to experience it in class first, and then asked me what I was learning to dance for. Teacher Wu Di suggested that I take a basic class, unlike other schools that strongly recommend me to take a remedial class no matter what I do. I'm over 30 years old, so what should I do as a coach? It's ok to have some fun. I started to sign up for fitness classes, but the class time was limited. Later, I changed the basic courses of professional courses, and at least allowed me to attend classes for one year at will, which is equivalent to getting an annual card.