Samba in this case isn’t referring to the dances you see in Rio de Jineiro, Brazil with the frilly feather hats, though there’s no reason why those can’t be worn. Ballroom samba is quite different. Regardless, it’s still a very high energy dance characterized by a bouncing action in the legs which is really a forward and back motion of the thighs, not an up and down action of the torso as is so commonly thought.