That, plus DJ, motivational speaker, and (for in-person classes) often a friend. At Peloton's scale, I imagine recordings would work just as well. But, the in

That, plus DJ, motivational speaker, and (for in-person classes) often a friend. At Peloton's scale, I imagine recordings would work just as well. But, the instructor does the same things. For live classes with smaller groups, there can be a lot of 1-on-1 interaction.