Rumba
The international ballroom Rumba is a slower dance of about 120 beats per minute which corresponds, both in music and in dance to what the Cubans of an older generation called the bolero-son. It is easy to see why, for ease of reference and for marketing, rumba is a better name, however inaccurate. It is the same kind of reason that led later on to the use of salsa as an overall term for popular music of Cuban origin.