Let's say that the previous week I bumped into a lot of people I knew as a child. Each event was random, occurred independently of the other and all were unconnected except that each of the people involved knew each other at around the same time that I knew them.
Serendipity seems a bit too strong a word for this because I gained no fortune and there was no chain of dependence in the events. Coincidence doesn't really fit, either.
There must be a word for this - or a way to explain it concisely. What is it?