(AUTHOR'S NOTE: Questlove is not a tango DJ; he's just cool) At Tango Northside, the music we play in our classes, at our practicas, and at our milongas is very important to our mission. Michael is the DJ for our milongas most of the time, but occasionally we will invite guest DJs. When we do, we will want them to follow the same structural outline as Michael uses. For a three-hour 180-minute milonga, the structure is as follows: Play four-song tango tandas Play three-song va