Diner culture refers to the unique social and culinary experience found in diners, which are casual restaurants often open 24 hours. Originating in the United States in the early 20th century, diners are known for their diverse menus that typically include breakfast items served all day, burgers, sandwiches, and comfort food. They often feature a retro aesthetic, with booths, counter seating, and a friendly atmosphere. Diners serve as community hubs where people gather for meals, conversations, and socializing. They are often frequented by a mix of customers, from late-night workers to families and friends. This culture emphasizes a sense of familiarity and comfort, making diners a beloved part of American life, often associated with nostalgia and local traditions.