I was following recently a discussion "If you must play alternative..." on the Tango-DJ mailing list.
The posts in that thread that appealed to me was that one by Patrick J. Lademan which I am posting here.

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If you are the teacher, you can teach them to appreciate the golden age music. Don't teach by dictating, teach by providing inspiring examples.

I recently taught a DJ class. I assumed that everyone could Trespie. I alternately played 30 seconds of Ella Es Asi against Mi Corazon about 4 times. I watched them dance. It was very clear that Ella Es Asi inspired them to dance trespie while Mi Corazon did not. I was surprised that they were all very consistent. Then I asked them, which one inspired you to dance trespie? Although milonga can be danced Lisa or Trespie, it is the traditional music that inspires trespie.

This can be done for tango music as well. Pick a Golden Age song with a very strong marcato (dump-dump.. ...... dah). Teach them to dance the marcato. After they really get it, play an alternative song. Ask them how the step felt. Hopefully, they will admit that they were not inspired because the music did not provide it. If we dance to the music and the music does not contain the rhythm, we should not be inspired to dance marcato?

It's not about whether one music is good or bad. It's about what you want your students to learn. Teaching them how to dance to the traditional rhythms will teach them how to appreciate the music. They will eventually crave the traditional music because it inspires them to dance the steps they learned.
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