Cuarteto Los Cosos de al Lao The formation of the quartet "Los cosos de lao" took place in 1996. In the rythm of today's urban pulses, the orchestra plays the arrangements with the freshness of an improvisation, and integrates different styles of music without losing the essence of the tango. In its style, it plays their own compositions as well as those of famous authors, in an excellent manner. "Los cosos de al lao" was the regular orchestra of the legendary "Cafe Tortoni" in Buenos Aires. Both popular and muchappriciated is it not only in the tango-scene in and around Buenos Aires. It played in several countries in South America and Europe, in Australia, Africaand Japan, where it enjoyed hugh successes.