I don't thing that there is such a dance "American Samba". Samba is one of the five dances in the Latin American competition such as rumba, cha cha, jive, paso doble and samba. Those dances used to be called International style. In the american rythm competition, we have rumba, cha cha, bolero, east coast swing and mambo. They used to be called the American style.
Franco