We went for sunday brunch at the Biltmore, followed by a guided tour of the hotel. We did not stay there.
We thoroughly recomend both.
Brunch consists of nine food stations with different themes e.g. bbq, carvery, sushi etc. You can eat as much as you want. Champagne, which is discretely filled up when you are away from the table, is also included, as is coffee and water. If you are driving you have to watch this or you may end up as a guest of the Miami police! Food is top class, as is the champagne.
If you can move after this, the guided tour is also a must! You will be told the history of the hotel, uncovering a few surprising facts, and be shown around the plush building.
Brunch was $50 each, which may sound a lot, but given the quality of food & drink is actually very, very good value.
The tour is free! Leaves from reception at 13:30, 14:30 and 15:30.