The land of Graal: The Time Of Change... for worse

You open the letter and read it. It says:

Dear Robert,

You may already know that the Wetland's King has agreed to ally with the Graal Kingdom. Tonight, there shall be a celebration in honor of this, and I would be honored If you could go. Please come AS soon as possible. There shall be a great banquet, with exotic dancers and many other forms of entertainment!
Sincerely,
The Graalian King

What are you going to do?