For those of you that are interested in dinner at the Seawind Club the best way is contact the restaurant manager, Elvis, directly. (yes his name really is Elvis )
The restaurant at the club is called Calypso and their phone number is 876-940-9660. I was not able to arrange a dinner there before I left for my wedding in Jamaica but the club was located next door to our resort (Secrets Wild Orchid) so once we got settled in we walked over the restaurant and spoke to Elvis. He was absolutely fantastic. He reviewed the menu with us, made recommendations, and, showed us the wine list so we could pick a bottle in advance and he would make sure he had it ready for our dinner. We decided to not have dinner there on our wedding night but instead to have a special dinner there to kick off our honeymoon phase of the trip.
When we originally made the plans with Elvis we were expecting to have a candlelight dinner in the restaurant at one of the more private tables near the pool but when we arrived for dinner Elvis personally escorted us to the beach where his staff had set up a beautiful candlelight dinner for two on the beach. The food and service were both fantastic and I would highly recommend this restaurant for dinner. According to a few locals this restaurant also has the best Sunday brunch on the island.
As a side note - I tried making arrangements through our resort before I departed for Jamaica but they told me they don't do that. When we arrived at the resort we noticed that all the concierge desks have advertisements for Calypso restaurant saying they could arrange dinner for you. This annoyed me enough that I didn't even enquire about it (I'm assuming they would get a commission for booking you) and I'm glad I went directly to the restaurant as I'm sure if I had made arrangements through the resort we would have got a generic package deal instead of the beautiful personalized dinner Elvis arranged for us.