Hi,
We went to Polo last week on the first night and were also told that was the best night to go, but we were told you MUST have a reservation.
The chocolate souffle was AMAZING!
It is also true that one day we ate lunch in Parriott Cay (sp?) and saw on the way that another dining room was serving Key Lime Pie for dessert. So, we asked if they could get it for us and they did!! We got to eat the Asian Buffet and get the Key Lime Pie!
So, you can request an item in one restaurant if you know another is serving it. It wasn't a problem at all.