In a blog post just a couple back, I talked about spontaneous performance that looks like people in any given place just burst into song and/or dance. Here's a great video that says it all. While looking spontanous, there's definitely some practice involved in a production like this, but there's also the spirit of bringing the arts to eye level, no matter where the audience is.
http://www.silverbearcafe.com/private/04.09/antwerp.html
