Milonga is a term for a place or an event where tango is danced. People who frequently go to milongas are sometimes called milongueros. The term "milonga" can also refer to a musical genre.
The music played is mainly tango, vals and milonga (as the musical genre). Most milongas are held on a regular basis (usually weekly), and they often begin with dancing classes and sometimes demonstration dances. Usually, three to five songs of a kind are played in a row (this is called tanda) followed by a short musical break (called cortina) to clear the dancefloor and facilitate partner changes. There are a number of informal rules that dictate how dancers should choose their dancing partners.
Due to the strict assembly ban imposed by the military government, milongas almost disappeared from Buenos Aires in the 1960s and 1970s. Nevertheless, since the beginning of the 1990s, the tango culture in Buenos Aires has undergone dynamic development, and today one can choose from between fifteen and thirty different milongas every day.