OK, paper rounds don't count (I had several)
I lived right on the edge of town (literally... there were no roads beyond mine, just hospitals and farms), surrounded by 3 of what were then called mental hospitals. Pretty much everyone in our neighborhood worked in them, from doctors to cleaners. Most of the neighborhood were immigrants (Ireland mostly, Italy, Spain, Portugal, India, Sri Lanka, Jamaica, Malaysia etc).
From 16, I worked as a "domestic assistant" for 2 years at weekends (= washing up, cleaning floors and toilets)