When I tried to book the Plantation she told me it was already booked. I wanted to have it at a private area, so she gave me the option of having it by the pool or at Seagrapes. They are both $50/pp which includes (set up, food, drinks). The good thing for me too, is that I can have both the dinner and the danicing at the same place (which is why I initially wanted the Plantation). I won't know until I get there and able to look at both places but I'm glad you saw Seagrapes and liked it.
In terms of the disco, I'm sure it will be perfect for many people, but I have quite a few older folks coming and stools just wouldn't work for them.