On the occasion of the Christmas holidays, each European or Western country faces the problem of gatherings in its own way. In this regard, a recurring theme is: how many people or relatives can get together. According to the common sense, some suggest that the number should be established in relation to the size of the house or room. But it is really high the number of families living in 50-60 square meters, and sometimes even less. Understandbly, people are tired, exhausted by this pandemic climate and intend to live some moments of normality; politicians dislike to be unpopular, and the big troubles arrive.