All human beings dine, meaning that their food is prepared or processed in various ways, and there are rules of conduct in the ways that it is eaten. As social animals, humans usually dine with others within families, among friends, or in public settings. Public dining comes in many forms, from various kinds of indoor restaurants to such organizational meals as church suppers and fish fries, to summer picnics. Worldwide, the most common form of public dining is known as street food. This phrase covers many kinds of venues and lots of varieties of food. Today, roughly 2.5 billion people around the planet eat street food.