Plan B
Ok, here is a little twist. I'm traveling from SAN-JFK-SJU in "business class". Since it's considered a trans-con F class (or business) I can access the club in SAN because of the trans-con F class SC access rule.
Question is this, once I get to JFK, can I use the club while I wait for the SJU flight? This is assuming they don't give me access based on my business class ticket going to SJU.
(IMO, if they aren't considering Caribbean destinations for club access while in biz class and they have no BE product in that market, why not just call it First class and be done with it?)