There is one in Havana in February http://www.jazzsummerschool.com/cuba/where-when-&-how-muchSpeaking as a Canadian, that's a truly excellent question!
$1300 CAD. A bit pricey for a one week course.There is one in Havana in February http://www.jazzsummerschool.com/cuba/where-when-&-how-much
But that is the only one I know about. It's a bit odd, since there are hundreds in the summer. Coming from Massachusetts, I am only slightly less desperate for warmth than my Canadian brothers and sisters.