Delhi, a handful of doctors at a time
Four or five people, one bench, and enough time that everyone actually performs the work rather than watching someone else do it.
A large room can be taught at. It cannot be taught. Andrology technique is corrected in the moment, when a smear is too thick or a count drifts because the chamber was loaded badly, and that correction only happens if someone is standing next to you.
So these sessions run with a handful of doctors. Everyone loads a chamber. Everyone makes a smear and reads it. Everyone runs a gradient and looks at what came back. Nobody spends the afternoon at the back of a room.
It is the same reason the two-day course is capped at six.