This rare view of the Ballroom (Florida Historical Society collection) shows the entrance (center) as you enter from the top of the stairs in the Rotunda. Looking west, down the entrance hall you can see the center front entrance door of the hotel (bottom, viewed from the outside.) In the picture below (courtesy Historical Society of Palm Beach County) the steps are partially obscured by what appears to be the same plant.
The doors were framed with leaded glass. A piece of wicker furniture is visible just inside the doorway. Note the cuspidors scattered around the room- a measure to keep the grass-green carpets clean.
In the top picture, the Ballroom (more here) is decorated with Japanese lanterns- a very popular motif of the day. Flagler's hotels staged three important balls every season: The New Year's, George Washington Birthday and St. Patrick's Day Ball.