I run a BnB in Brittany, France. Here are just two of many events that have occurred in recent years that I can only describe as amazing coincidences:
1)totally separate bookings from 2 Italian families, for the same dates. They arrive within minutes of each other...and the guys throw their arms around each other in amazement: a surgeon and an anaesthetist who used to work together.
2)new clients arrive from Lille, some 600 km away.