I periodically organize an event called "All You Can Meat", and Espetus is one of the primary venues. Guys dressed like gauchos come to your table and shave off chunks of meat from skewers until you turn the green/red card to red.
Meats include sausage, rosemary chicken, pork loin, top sirloin, and of course the Brazilian specialty of chicken hearts. Meats covered with cheese are the most popular. Oh, and for the faint of heart, there's an all-you-can-eat salad bar, too.