I would say my sister's was about an hour and a half. She had hers on a balcony off of the second floor of the lobby in the GF. It overlooked the pool area and the lagoon. It was lovely.
After the ceremony, the limo took about half the group over to the GF while the remaining people and bride/groom finished with pictures. Then the limo came back and brought the rest of us over. We all waited on the balcony and someone introduced the bride and groom, they came out onto the balcony and danced a first dance. They had the violinist from the ceremony provide music during the cake cutting reception. We had a couple of toasts, they cut the cake, and we all ate, drank and talked for a bit. Then they took some more pictures, inside the lobby and on the balcony.