I lived in Spain for two years growing up. I boarded at a spanish school.
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lunch was tradition 2 hours long, not the eating etc
students that did not live at the school sometimes brought their lunches in those contenders and left them in the kitchen , served hot
for their lunch. then they took them home and brought them back etc.
for other Day students , some had their lunch included w their tuition etc. it varied.
" Workers " esp outdoor workers used them also for their lunch. outdoors just meant they could be seen w the
sets coming and going. I suspect office workers might have done the same
however lunch was routinely at least 2 hours long and the largest meal of the day.
everything closed. many people went home as that was the idea.
dinner was at 10 PM BTW, and no sooner.