The décimas are sung to stock melodies, with standardized cuatro accompaniment patterns. About twenty such song-types are in common use. These are grouped into two broad categories, viz., seis (e.g., seis fajardeño, seis chorreao) and aguinaldo (e.g., aguinaldo orocoveño, aguinaldo cayeyano). Traditionally, the seis could accompany dancing, but this tradition has largely died out except in tourist shows and festivals. The aguinaldo is most characteristically sung during the Christmas season, when groups of revelers (parrandas) go from house to house, singing jíbaro songs and partying. The aguinaldo texts are generally not about Christmas, and also unlike Anglo-American Christmas carols, they are generally sung by a solo with the other revelers singing chorus. In general, Christmas season is a time when traditional music—both seis and aguinaldo—is most likely to be heard. Fortunately, many groups of Puerto Ricans are dedicated to preserving traditional music by continued practice.