Yoga studios routinely run classes far larger than a teacher can individually attend to. The reason is arithmetic, and it explains much of what students experience on a mat.
Rent is fixed and dominant
A studio pays the same lease whether a class holds four people or forty, and in most American markets rent is the largest line in the budget.
Revenue therefore depends on how many bodies occupy the room during each scheduled hour, since the cost of that hour does not change.
Studios in high-rent neighborhoods face the sharpest version of this, which is why the largest rooms tend to appear in the most expensive locations.
Teacher pay is usually per class
Most teachers are paid a flat rate per class, sometimes with a small per-student bonus above a threshold, rather than a share of revenue.
Under that structure the studio captures the marginal revenue from each additional student while the teaching cost stays flat.
Teachers absorb the additional work of a fuller room without proportional compensation, which is a recurring source of turnover in the profession.
Unlimited memberships change attendance
Membership pricing decouples payment from attendance, which stabilizes revenue and makes forecasting possible in a business with volatile drop-in traffic.
It also encourages members to attend more often, which fills rooms further and increases the pressure on popular time slots.
The result is the familiar pattern of packed evening classes and near-empty midday classes, which the schedule cannot easily correct because the demand follows working hours rather than studio preference.
Class size changes what teaching is
In a small room a teacher can observe individuals, offer alternatives and correct sequencing risks before they matter.
In a full room, teaching becomes broadcast instruction, with cues delivered to the average and individual adjustment largely impossible.
This is why beginners often fare better in an explicitly designated beginner class, where the format assumes a slower pace and more explanation regardless of how many people are in the room.
Experienced practitioners are less affected, since they can self-regulate, which is why full rooms tend to work acceptably for regulars and poorly for newcomers.
What alternative formats change
Private and semi-private sessions cost more per hour precisely because they remove the cross-subsidy that a full room provides.
Community classes and donation-based sessions work in the opposite direction, running larger and often with newer teachers gaining supervised experience.
Anyone practicing with an injury or a medical condition should seek a format where individual attention is structurally possible, and should confirm suitability with a clinician first.