There's two types of problematic guests for CG and they often overlap:
1) Guests who just eat apps/dessert to have a good view for fireworks.
2) People who hold tables for three hours while waiting for fireworks. '
What they saw post-reopening is that while they were still selling out basically every night, more people were coming just to eat a nice meal. Less people were there to split a flatbread and a piece of cake, just so they could enjoy a fireworks view. Also, with no fireworks, gone were the people who would hold tables for 3+ hours.
When the fireworks came back, they saw a massive revenue decrease as these types of guests started showing back up. It was more common than people thought, as the average check went down quite a bit. Even surprising a lot of the longtime F&B managers.
So while they have chosen not to set a time limit on the length of a visit, they have created basically a "cover charge," via the prix fixe, to make up for this lost revenue.