I saw through the act almost immediately.
What they were doing was sort of wrestling match. Entertaining the patrons with a peculiar act. Besides, they would abuse each other, but if one of the patrons would try to join in the abuse they would quickly shut the person down. And the rest of the patrons would help "move" the unwanted third party out.
The burgers were delicious, if a tad overpriced. But then if you went there more than once it wasn't just for the food but for the show.