Pantries. This is a pic of the house I lived in from1954 to 1959 (I was 5-10 years old at the time).
The small extension on the left consisted of two rooms. The room in front was the coal hole which contained coal. Coal was the only form of heating we had.
The room in the back was the pantry. It was the room where we stored everything that nowadays would be kept in the fridge (butter, meat anything that needed to be kept cool).
The reason we didn't keep stuff in the fridge is because we didn't have one...
View attachment 553482
Good design, environmentally friendly - no electric fridge needed. I'll bet there were plenty of shops in walking distance, fresh food and perishables bought as required and not stored for long. We've lost a lot of sensible things over the last 50 years.