To dance a Rumba we do not have to know what is a Clave or a Son. Leave that for the musicians. Most of them couldn`t dance their way out of a paper bag.
In 1947 the Rumba was that square thing which today would be considered a joke
I used to have a tape by Doris Laval who with Pierre helped to standardize Competition Latin American.It only has a fleeting resemblence to todays Latin in particular the Rumba. Who among us can remember when The Rumba was played at 30 BPM. Today it is officially down to 25 BPM.