Jacuzzi its big enough to accommodate the perfect amount of people not spread out and not crowded.
it's very crowded at times, but this is part of the fun , to go from far end to the bar

, you maneuvering around other naked couple and may "meet" somebody on the way

we just came back from Couples Negril and that place sucks with a capital S. Nothing to do during the day and everyone go to their room at 10PM. Anyway best of luck
After Desire, we wouldn't really like to go back to Couples, but imho after regular adult resorts, Couples is pretty good (been only in San Sochi, no idea about Negril)