I was so forgetting that the banquet was actually held for three nights.
The first night was a kind of opening gala, when the high society came to give their greetings. The second night was some kind of cultural exchange night, and the last night would be a prelude to 'going away' where the Lord would announce the start of the annual inspection journey.
During the second night, representatives from the citizen of the realms, as well as foreign delegations, would start to attend. There would be a cultural show, from singing to traditional dancing, as well as the spread of culinary from every corner of the realm--I guessed this was why most of the foreign delegations came in this day.