Wikipedia
A korsi or korsí ( Persian spelling: کرسی) is a type of low table found in Iran, with a heater underneath it, and blankets thrown over it. It is a traditional item of furniture in Iranian culture. A family or other gathering sits on the floor around the "korsi" during meals and special events, like Nowruz (Persian/ Zoroastrian New Year's Eve). "Korsi" used to be quite popular for entire families to gather together during yearly Yaldā celebrations.
Korsis are generally heated with electric elements or, traditionally, with a brazier containing hot coals that is placed under the table. The table is covered with a thick cloth overhanging on all sides to keep its occupants warm. The occupants sit on large cushions around the "korsi" with the cloth over their laps.
A special woven rug called Ru Korsi (Persian: روکرسی) is usually placed over any blankets to protect them from food stains.