There are in our society horizontal strata formed of persons with similar tastes, and within those strata, casual meetings (are there such things?) are not unusual, especially when the cause of the stratification is a quality common to a very few. I have had the experience of running into a person in Berlin, then in a remote village in Italy, and finally in a bookstore in Buenos Aires. Is it reasonable to attribute those repeated meetings to chance? But I am belaboring the obvious: any person devoted to music, or Esperanto, or spiritism, will know that.
