Other than locally where it is seems to be unavoidable... I did see somebody from work in the airport in Florida. Which in reality is not that unusual because that is a very popular non-stop flight from here.
I guess one odd thing is though, (I did not know the people, but DH talks WAY too much to strangers) on vacation in Branson, MO we uncovered through a long conversation w/some people at the pool we never met before that her aunt was good friends with my mom, and I knew a lot of her family. It was one of those things where people are talking and they said oh yea we have relatives in such and such area, and it gets narrowed down to a town, and then it's names you recognize.