Unusual Restaurants In The World

History
In Ancient Rome, thermopolia (singular thermopolium) were small restaurant-bars which offered food and drinks to the customer. A typical thermopolium had L-shaped counters into which large storage vessels were sunk, which would contain either hot or cold food. They are linked to the absence of kitchens in many dwellings and the ease with which people could purchase prepared foods. Besides, eating out was also considered an important aspect of socialising.
In Pompeii, 158 thermopolia with a service counter have been identified across the whole town area. They were concentrated along the main axes of the town and the public spaces where they were frequented by the locals.
Food catering establishments which may be described as restaurants were known since the 11th century in Kaifeng, China's northern capital during the first half of the Song Dynasty (960–1279). With a population of over 1,000,000 people, a culture of hospitality and a paper currency, Kaifeng was ripe for the development of restaurants. Probably growing out of the tea houses and taverns that catered to travellers, Kaifeng's restaurants blossomed into an industry catering to locals as well as people from other regions of China. Stephen H. West argues that there is a direct correlation between the growth of the restaurant businesses and institutions of theatrical stage drama, gambling and prostitution which served the burgeoning merchant middle class during the Song Dynasty.