You can go to jail if the amount is large.
Because the organizer has carried out business activities, not commercial activities.
Therefore, if there is a fee, it is a profit-making legal person organization, so it needs industrial and commercial registration, business premises, environmental protection, fire protection and safety assessment reports, invoicing you, paying taxes to the government and signing service agreements with your "customers", which is equivalent to the operation of a company.
It is clearly restricted by the Administration for Industry and Commerce.
If he is talking about collecting fees, he is kind enough to pay for your collective purchase of dance necessities, and finally all of them are spent on you, then provide a clear list of expenses. Otherwise, it is illegal business, and if the amount is large, you will go to jail. If your "customers" have personal accidents in the process of dancing, they will bear legal responsibility.
As long as someone calls the industry and commerce, taxation or public security bureau to report this matter, the person in uniform will immediately bring your organizer for questioning.