Sevillanas is a type of folk music, sung and written in Seville, Andalusia although it does not originate from Seville. The Sevillanas is an old folk dance, appearing always during the feasts, danced by couples of all ages and sexes, and usually danced by whole families and 'pueblos' (towns). Historically, it was a derivative of Castilian folk music, spiced with a bit of Arabic rhythm. It has a relatively limited musical pattern, but rich lyrics, based on countryside life, towns, neighbourhoods, pilgrimage and, of course, love themes. Every year, dozens of new sevillana discs are published.
The choreography of the Sevillanas is stable, and knowing it is very useful, because it is a fiesta (party) dance.
Sevillanas can mainly be heard in southern Spain in fairs and festivals, including the famous Seville Fair, La Feria de Sevilla. It is important to distinguish Sevillanas from Flamenco, because they are often confused but are not the same.
The Sevillanas is not an extremely energetic dance, as opposed to Salsa or Flamenco for example, so it is perfect for those who want a more relaxed session of exercise. You could also choose it as a compliment to a more vigorous dance, in order to have a good balance. Do not be fooled however, you will still have to work hard to learn the steps as it does have its own peculiarities.