The rows of stacked oranges in Jemaa el-Fna are one of those sights that hits you before you can even explain why. There can be forty stalls, each with a small mountain of fruit and a manual press, each with a vendor calling out to passing tourists. At peak season the square smells of citrus from fifty metres away.
The juice is genuinely excellent — Morocco's Souss Valley around Agadir is one of the world's premier orange-growing regions, and the Navel varieties harvested from November to March are particularly sweet. The tourist stall price (15–25 MAD for a large glass) is many times what a local pays but still cheap by European standards. The key is to sit down, enjoy the spectacle, and not compare it to the 4 MAD glass you could get at a café off Rue de Bab Doukkala.
Outside Marrakech, fresh juice is equally easy to find. Fes has excellent pomegranate juice (grenadine fraîche) pressed from local fruit in autumn; Agadir juice bars serve thick avocado smoothies year-round; and in Tangier, the influence of Spanish café culture means freshly squeezed orange juice arrives with breakfast at most cafés as a matter of course.