I'm Brazilian and go to Churrascos a lot (I think abroad you just call them Brazilian steakhouses). You sit down and people come around and give you different cuts of meat for a fixed price. Of course, this also includes a buffet and bread and bananas etc.
I only eat the meat. I only eat the most expensive cuts. Most people fill up on bread and salad and order a desert and some drinks (expensive) and don't eat that much meat in the end. I know for a fact I am losing them money because the owners know me and even joke saying "If everybody ate like you I'd be put out of business"
So I am wondering if you own an all you can eat sort of place what percent of customers hand you a loss?