Terry, I agree with you wholeheartedly, the best thing I want in a resort is one that has a good amount of live Cuban music. I am always a little mad and POed when there is no music. We took a change from Cuba last year and went to Panama to a very nice resort but it could have been anywhere as there was no live music at all, except for a guy playing Ecuadorian music on the pan’s and a guy playing classic rock on an acoustic, each only for one night. My information is a from a few to several years old; but 2 years ago the Playa Turquesa (was Sirenis) had a trio playing in the buffet most nights; I believe Las Panchitos still plays some afternoons and most evenings @ the Brisas Guardalavaca; in 2008 (I think, the years run together), the Sirenis La Salina, in Varadero, had Sexteto Primavera playing every night for ~ 3 hours after the main show in one of the snack bars. My favourite lobby bars were at the Iberostar Varadero and the Playa Turquesa.
I think generally (and one must be cautious of generalities) but the resorts with the most music are more likely to be in either Varadero or Guardalavaca, as they have a large local population to draw from for talent.
Hopefully, someone will be able to update you on these resorts as my info maybe and probably is out of date, given the many changes that happen with Cuban resorts.
If you find a good one let us know, as I will looking for one this winter!!