THEATRE: Free Concert: Once a month there is a free concert at Teatro Colón, so watch out for it. You have to queue for tickets the day before, and there is a max of two tickets per person in the queue. But if you can't afford tickets any other way, it is well worth standing in line. See http://www.teatrocolon.org.ar/en/index.php?id=home
Wooden subway in Buenos Aires as photographed by globetrottergirls. There's still one line that runs with old timber trains. Be sure to take a ride and feel like you've been sent back in time when you study abroad in Buenos Aires.
TANGO: Dancing at the open air milonga at La Glorieta de Belgrano - weekend evenings. (Fotografía de Alejandra López.) This is where Sallycat met her man, and is the location of the photo on the cover of her book Happy Tango (http://www.amazon.com/Happy-Tango-Sallycats-Dancing-Buenos/dp/0956530605). Go to watch even if you don't dance yourselves. (Preview at http://www.youtube.com/watch?v=9MFqXQeWK_o) Chinatown is across the road when you get hungry.