Group lessons:
During periods of low attendance, two levels or age groups may be combined. Group lessons with fewer than 4 people are reduced by 1 hour per day. A group lesson must have at least 3 participants to be maintained. To make the groups as homogeneous as possible, the maximum number of students per class may occasionally exceed the announced limit.
Semi-private lessons:
A semi-private lesson must have at least 2 participants to be held, with a maximum of 5 students per group.