Gym: First, you choose a place with convenient transportation. No one wants to take the risk of traffic jam to go to the gym to find the floor, do market research or go to other gyms to find out the situation and decorate, then buy fitness equipment and hire professional fitness instructors. You can work full-time or part-time. You can go to school and invite some teachers to do part-time jobs. It is more cost-effective for part-time workers to settle their wages according to the course. Finally, your advertising campaign. Set up some courses such as yoga, aerobics and street dance to attract customers. Street dance coaches can work part-time in regional colleges and universities. Many students dance very well and their wages are low. My answer is over.