In fact, one card (meal card) is enough. Of course, it is after 3: 30 pm on weekends or Fridays (that is the last class in physical education class).

At other times, during class, you can go in and have classes with other students who have classes.

Go in before 2 o'clock on Friday afternoon, just pass by the guard's uncle, and you can tell the teacher that you are here to exercise. Generally, the teacher will be happy to let you occupy a venue for activities.