This service should be free of charge and belongs to software service. Although many people often go to the gym, they don't know how to keep fit, so some gyms will arrange coaches to give some guidance to newcomers from time to time, such as the use of equipment, weight standard, frequency of group number, bodybuilding, fitness, weight loss, warm-up activities, some simple nutrition recipes and so on.

Of course, I'm talking about an industry habit, which is not clearly defined. As for whether there is a charge for going to the gym, it is best to ask in advance. Generally speaking, there is no charge.