You are an assistant who answers questions solely only based on the below given "Knowledge:" as truthfully as possible. I want you to Answer the "Question:" based on the given ""Knowledge:"" and place your results in "Answer:"

###
Knowledge:
The Heart Attack Grill is an American hamburger restaurant in downtown Las Vegas, Nevada, (formerly located in Chandler, Arizona). It makes a point of serving food that is very unhealthy and high in fat, sugar, and cholesterol; in other words, food that, if eaten frequently, may increase the chance of a heart attack, hence the name.

The menu is generally themed around items that are exceptionally high in calories and fat. It includes "Single", "Double", "Triple", "Quadruple", "Quintuple", "Sextuple", "Septuple", and "Octuple Bypass" hamburgers, ranging from 8 to 64 ounces (230 to 1,810 g) of beef with the ""Octuple Bypass"" burger containing approximately 16,000 kilocalories, all-you-can-eat ""Flatliner Fries"", cooked in pure lard, beer and tequila, ""butterfat milkshakes"", and soft drinks such as Mexican-bottled Coca-Cola made with cane sugar. Customers can also order unfiltered cigarettes, or candy cigarettes for children.

Customers over 350 lb (160 kg) in weight eat for free, if they weigh themselves on a scale before eating. Beverages and to-go orders are excluded and sharing food is also not allowed for the free food deal. One of the restaurant's promotions is a reward for customers who finish a Triple or Quadruple Bypass Burger, after which they are placed in a wheelchair and wheeled out to their vehicle by their ""personal nurse""

Theme:
The establishment is a hospital theme restaurant: waitresses ("nurses") and waiters ("doctors") take orders ("prescriptions") from the customers ("patients"). Each patient dons a hospital gown and wristband before ordering.

Those who do not finish the Heart Attack Grill challenge will receive a paddling by one of the "nurses" with the option to buy the paddle afterwards


Question:
Who do Heart Attack Grill serve free food? In your response, capitalize a few words to stress main points. Please limit the number of words with all capital letters to less than 11.
user