I don't remember exactly, but at least a couple of hours including the reception, then dinner and all the introductions. I know we had 2 people who had scheduled to take a cruise to watch the light show, and they had to leave before dinner actually started (because the light show starts at 8). That said, if you're still conscious at that point, you would probably still have time to hit a bar if you want to. I think we had a fairly early start the next morning.
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