“Personally I love giros as I think they are a perfect microcosm of tango. It's like holding a miniature globe in your hand and knowing that it's real.”
That's just so gorgeous and poetic that I had to put it up.
It's worth reading all the comments on that post. As often happens, they're far more interesting than the post itself, which is a routine whinge about common problems with classes. First there's some stuff which clarifies what I was talking about, then Gamecat and Ghost work up a beautiful model of tango speciation, starting with the natural selection process described by Christine Denniston in her talk, but under quite different conditions. Then there's some thoughtful and practical stuff about leading and following turns, and how people do it, and why.