This has nothing to do with technology, it's just really cool.
I went to a juerga Sunday night at the invitation of my flamenco teacher, who dragged me up in front of all the aficionadi to dance all four couplas of sevillanas with her. (Note to the cognoscenti: yes, I know that sevillanas is not flamenco puro). By an amazing coincidence, I happened to be wearing my dance shoes at the time.
Found out at class last night that the organizer of juerga, a performer herself, asked my teacher afterwards if I was a professional or one of her students.