friendly, welcoming, inclined to pleasant companionship and social relations, in a manner that suggests traditional customs or culture, often in a way that is actually artificial;
e.g. The band was playing a bright, folksy song, and people were dancing.
(adjective)
casual, informal, friendly, and unpretentious in manner or style, usually describing a person;
e.g. She used folksy language in her speech so that her audience would relate to her.