In most classes, the last 20 or so minutes is usually dancing the concept/pattern/sequence taught in the class over and over again. The teacher goes around helping and partners rotate at the end of each song. Two variations are common, the followers move to the next leader in the ronda or the leader moves to the next follower in the ronda.
But what Sebastian Misse did in a recent workshop was sit the women down on one side of the room while the men stood on the other side. Then the men had to cabeceo the women for the next dance. Its probably a little time consuming to wait until all the women down before playing the next song but I think its brilliant. More teachers should follow, its something that requires practise and is a vital skill for students.