Classes and Courses are conceptually different. A Course consists of a fixed number of classes that are usually repeated the same days of the week and booking the Course means participation in each class. An example can be a 10 classes Yoga Course that takes place on Tuesday at 18:00 and on Thursday at 19:30 with a start in November at a total cost of 120 EURO. A Class instead is extemporaneous and therefore is performed once and usually the member pays each time. In a sports center a typical example is spinning, where classes are also held every day or even several times a day but the booking is related to each class.