As you've discovered, the candombe rhythm is created when the three tambores (drums) are played together. Frequently, many drummers assemble onto the streets of Montevideo, playing their drums under the moon lit sky. Isla de Flores is the main street that joins Cuareim and Ansina, candombe's two main social groups. For over a century spontaneous cuerdas have paraded on this street, and continue to do so today. Isle de Flores is also known by its second name, Carlos Gardel. As the cuerda slowly makes its way through these streets of Montevideo, this contagious rhythm takes with it all in its path, surrounded on all sides by the neighborhood people dancing to the rhythm of their candombe. As these drums move down the narrow streets of Montevideo, doors and windows swing open wide to receive this message that's being delivered. At intervals the cuerda will pause, and by setting a fire, will heat their drums' skins for tuning purposes. Pure candombe.
Throughout the years there have been significant musical talents that have composed beautiful melodies to be played along with the candombe rhythm. They have written charming lyrics, most of which are about candombe and their love for it. When all the variables are in place; the rhythm, the melody, the harmony, you have Grupo del Cuareim.