We asked about extend your stay on the Ascent last week of March, in Fort Lauderdale . Even being a Retreat guest, the answer was No.
We were told they stopped offering this
FYI. If you are out of FLL international and a late departure, the airport is not pleasant to hang around. No restaurants and few seats They will not accept luggage any earlier than 3 hrs before flight time and no later than 2 hrs
There are a few hotels apparently that offer a day package. Perhaps someone else can answer