Forró is the most popular genre of music and dance in Brazil's Northeast, to the extent that historically "going to the forró" meant simply going to party or going out. The music is based on a combination of three instruments (accordion, zabumba and a metal triangle). The dance however becomes very different as you cross the borders of the Northeast into the Southeast. As part of the popular culture it is in constant change. The dance known as "college forró" is the most common style between the middle-class students of colleges and universities in the Southeast, having influences of other dances like salsa and samba-rock.