My sister emigrated to Perth, Australia, from Aberdeen, Scotland, where I was a college instructor.
After they'd been there for about a year, I flew with my mum to visit her and her family. A few hours after arrival at their house in Joondalup, I headed out with my sister's partner for a drink in a trendy suburb nearby.
Ordering our drinks, it turned out the young barman knew me. He'd been a student of mine back in Aberdeen. Small world!