In the 20th century “dance music” was often thought of as meaning: music played by dance bands. This kind of music developed into rock and roll in the 1960s. Nowadays there is a wide variety of popular dance music, including hip hop. Spanish or Latin American dances such as the samba, tango and cha cha cha are popular all over the world. Towards the end of the 20th century, a form of dance music known as electronic dance music (EDM) arose. This is electronic music which is made in a specific way as to be danced to, usually in the setting of a nightclub, discothèque or a party. Genres of EDM include post-disco, techno, house and trance, amongst several others. 