You make some good points. The opposite extreme to teaching students proper technique and preparing them for competitions is teaching a dance class on a cruise ship. The instructors will only see the students for a few days--at most. They need to find a way to teach something today that the members of the class can do tonight. If they find it enjoyable, some of the students may want to continue lessons when they get home. And if not, nothing is lost. The main thing (in this situation) is for the students to see that dancing can be fun.