We go Jersey week so we're always running into people we know. No, we don't know all of Jersey,

but since our schools are closed most of that week, lots of us head down. We've met up with friends for the day, run into my Ds's hairdresser last year, and quite a few other people we knew.
One year, our trip overlapped with DH's second cousin's family from Colorado. Since we rarely see them when they come to Jersey, we met up with them for a couple of days.
We did run into neighbors of ours in Las Vegas, neither knew the other was going to be there, so we had dinner together.
Another time we were in the Bahamas, and I said to my DH, that looks like your Dad. Sure enough, after we left for vacation, my mother in law decided to go to the exact same place. What a rotten vacation, we were trying to get away from them. We spent no time together, but just knowing they were in the same hotel was a bummer.
Small world.
edited to add: Posted by j's m, forgot my DS was logged in!