...not the film but a cultural import, tango, and its social background. If we hang out with good dancers, listen to the music and let it carry us along we can begin to dance good tango. But how much of the social background do we need? Do we need to play tangos in tandas of three? Do we need cortinas between tandas? I think regular use of cortinas is recent in London tango. In Buenos Aires it is general practice to dance no more than three consecutive tangos with any one partner, and cortinas are a sign to clear the floor: your time's up. But here it seems discourteous to abandon a partner after two or three dances; a good conversation should last a bit longer than 10 minutes. So cortinas aren't so useful here, although they are still a good way to change the sound a bit, refresh the ears, since most tangos have similar characteristics, and they also help dancers to mix more widely. But the convention of everyone going back to their seats after three tangos doesn't suit us, it's not a part of the social background we need.
But there is one part of the social background I really miss: empanadas. When you go to a milonga in Buenos Aires you settle in for more than a quick evening out, so you need to eat, and empanadas and toasted sandwiches are always available. How can you dance if you are hungry? Drinking without eating isn't such a great idea – especially if you are dancing. You meet your friends, enjoy food and a drink with them, and dance. Of course the social background is different: in the Mediterranean tradition the main meal tends to be lunch, and people snack in the evening. & of course our milongas don't usually run late. However, it is just possible that people would want to stay later if good snacks were available. You tend to settle in if there's food and drink, and night transport and arriving home late might seem a little more bearable.