I watched some of the videos on the website and this is so bizarre, even for the United States. I know various places have their one menu item that has enough fat and calories packed into it to kill a child, but this whole place is like that, it's like a real-life satirical franchise.
Nevertheless, I'd probably go there just for the experience. Like most people, I like to indulge from time to time, but I'm also kind of turned off from eating if I'm surrounded by obese people chomping away, so that could be problem.
But, I'd bet it goes out of business when one of the customers actually goes into cardiac arrest while eating there. Makes me wonder if they have an onsite doctor.