I would use just straight forward son or chachacha marcha as a basis and improv from there as appropriate.
Additionally try to play the base/tip softer than you would in a salsa situation thereby accentuating the melody of the open tone and slap and see how it feels.
http://www.youtube.com/watch?v=kCc61z9IFu4A most beautiful lady with a most beautiful voice. May she rest in peace!