The last time we were in the Carribbean it was warm in the evenings also but coming from England we probably find will feel the warmth more as it is minus 3 here tonight. You may find it chilly sometimes in the air conditioning but we are fine in short sleeve shirts / dresses in the evenings.
We are staying in Orlando for 7 days pre cruise to check out Mickey and his mates.
You are more than welcome to come to our wedding reception on the ship on the sunday afternoon before dinner as the chapel will be very sparce with just 6 of us
Hope you have a great time in Detroit.