Dmitry
A year ago, during the visit of my brother with his family, which suddenly lasted for almost two months, I developed the Law of the Big Apartment, which is confirmed today:
1) If more than one person gathers in one room (of five possible) within 4-6 minutes the rest of the population of the cave is drawn there.
2) If one of the people in the mentioned room speaks on Skype or works on some kind of stuff (a type of article, a book, a guide or a research project), the speed of filling the room with the population of the cave is reduced to 2-3 minutes.
The power of the law of a large apartment, surprisingly, is directly proportional to the number of free rooms.