What is "koinoniphobia"

Koinoniphobia is the fear of a room, rooms or shared spaces. Koinoniphobia was defined in 1891 in the North American Journal of Homeopathy as a "fear when in society or gatherings of people" whether on the street, in church or a public hall. The term comes from the Greek koinos meaning public, and phobos meaning fear. Later references refer to the term as an excessive fear of a crowded room.