The tango belongs to Argentina such as gauchos (Argentine cowboys), asado (Argentinean barbecue), mate or soccer. Some say dancing the Argentine tango is good to begin with when it comes to learn ballroom dances. I guess this is what tango teachers tell you. But before hitting the tango schools I would suggest you start from scratch by simply watching others dancing the tango in the streets of the city. There is a very high chance of watching locals dancing the tango somewhere in Buenos Aires.
What do you think is the best dance for starters?