If we visit chat now, we are shown three rooms https://chat.stackexchange.com/?tab=site&host=hinduism.stackexchange.com.
Of which, this room (https://chat.stackexchange.com/rooms/136751/room-for-johny-man-and-the-z) emerged from a post on Islam.SE. Then why is it being shown to users of Hinduism.SE too?
Does it have something to do with user Johny man's (https://hinduism.stackexchange.com/users/19288/johny-man) chat settings? Johny man is a member of Hinduism.SE and Islam.SE both.