I've wondered why the fresh orange juice machines you see in Spain commonly are never seen in the United States. Is there a food safety law that prevents this or is it just a matter of preference?
Some places in the US have them, but usually they are commercial units. For most Americans that shop for staples one every week or two a gallon of pasteurized juice that keeps for two weeks under refrigeration is great compared to oranges that would not last nearly as long. OJ is a common component of breakfast but our shopping habits do not support fresh juice.
Roberts Market in Woodside CA used to have an orange juice squeezer until a few years ago. It was really nice - I could toss in oranges (or grapefruit, or tangerines) and go home with delicious fresh juice. Don't know why they removed it.