Shanghai Coincidence

I flew to Atlanta this April to meet with a physician and whilst in the consultation I mentioned my son worked in Shanghai. The physician asked if I would be kind enough to give him my son's phone number so he could call him and get the names of some good restaurants in Shanghai. I said of course and agreed to give him my son's phone number. Two weeks later the physician emails me with this story. The physician and his wife were in the cocktail lounge of a restaurant in Shanghai suggested by my son and speaking with a couple across the table from them who also were from Atlanta. The couple mentioned that a friend of theirs had a son working in Shanghai. The physician mentioned that a new patient of his had a son working in Shanghai whom he had contacted to get the name of this very restaurant where they were dining. Both took out their cell phones to call this young man to ask about more restaurants only to find out that both couples were calling my son. The couple across the table from the physician and his wife were my friends of 25 years.