Everyone sings rocieras (flamenco-style songs about the pilgrimage) as they travel, and again at night around the campfire when the hermandades have stopped to eat, drink and dance and make merry, accompanied by plenty of wine. It is alleged by some that the annual baby boom which happens nine months after El Rocio always includes offspring produced as a result of extra-marital dalliances.

The flamenco outfit was originally worn by Spanish Gypsies (Roma people), but is now generally thought of as typically Andalusian and is particularly associated with Andalusian festivals such as the Seville Fair (Feria de Abril). The outfit originated in the late 19th and early 20th centuries when women vendors dressed in modest calico gowns adorned with ruffles came to the fairs along with livestock traders. In time, women of the propertied classes copied these outfits worn originally be rural workers.