There isn't much advice to give. As far as I know - from European colleagues and business associates (since as an American I cannot easily visit Cuba, at least legally) - there is actually only one 18 hole course on the island (Varadero). I think there's another that says its 18 somewhere close to Havana, but its really just 9 with two sets of tees.
Cuba is not exactly known as being one of the world's golfing hotspots ...

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PS. Be careful - if you're an experienced traveller I'm sure you'll be fine - but if its your first trip to a "developing world" country, well, extreme poverty produces people with nothing to lose. Cuba used to be considered relatively safe, but things are getting a bit wacky just now. The following, for instance, might be of interest to you - since it concerns your locations (it was issued early this year by the Canadian government):
"Cuba is rarely thought of as a hotbed of crime, but the Department of Foreign Affairs is warning tourists that increasing numbers of Canadians have been victims of pickpocketing, theft and assault -- especially in Havana's Old Havana, Centro Havana, the Malecon, and Vedado and on the beaches of Playas del Este and Varadero. Those who are mugged and stripped of identification and money should contact the Canadian embassy before the local cops, who may just toss them in jail until their identity is confirmed and their solvency restored."