Hamburger and Sonic also rely heavily on hamburger sales. Fuddruckers and Red Robin are hamburger chains that specialize in the mid-tier "restaurant-style" variety of hamburgers. Some restaurants offer elaborate hamburgers using expensive cuts of meat and various cheeses, toppings, and sauces. One example is the Bobby's Burger Palace chain founded by well-known chef and Food Network star Bobby Flay. Hamburgers are often served as a fast dinner, picnic or party food and are often cooked outdoors on barbecue grills. A high-quality hamburger patty is made entirely of ground (minced) beef and seasonings; these may be described as "all-beef hamburger" or "all-beef
Rudolf Hamburger with the International Congresses of Modern Architecture. With the help of Syrkus, Rudolf Hamburger entered into a form of architectural partnership with a Warsaw architect called Spiwall. The partnership concentrated on residential houses and villas. Hamburger's residence permit did not permit him to earn money in Poland. Some sort of financial arrangement with Spiwall was nevertheless devised, and Hamburger did most of his partnership work from home. However, a succession of "conspiratively arranged" changes of address made it increasingly hard for Hamburger to work in the city. He did draw up plans for a substantial ten dwellings unit for his