Thanks for posting - I'm still under 10 posts so can't.
As strictly a Casinero, this is definitely my style of music to dance to. I've also been lucky enough to catch JG a few times live in Havana - great performer and really gets the crowd going!
I am listening and watching authentic mambo dancing by Roberto Roena and Anibal Vasquez who was one of the Mambo Aces dancing mambo in the Palladium, this Mambo they are dancing is called "La Perfecta". The number the band is playing is called Ponte Duro.