Some cities had disco dance instructors or dance schools which taught people how to do popular disco dances such as touch dancing, the hustle and the cha-cha-cha.
en.wikipedia.org The group performed a wide range of folk and popular music styles including polka, oberek, waltz, rock (medium and slow), country, tango, cha-cha-cha, foxtrot, swing, and rumba.
en.wikipedia.org Manufactured using vacuum tube technology, it plays 13 electronically generated rhythmic accompaniments such as the bolero, waltz, rhumba, cha-cha, tango, samba, and beguine.
en.wikipedia.org