Night Club 2 Step.
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Nightclub Two Step
(Nightclub Two-step, NC2S)
was initially developed by Buddy Schwimmerin the mid-1960s.
The dance is also known as"Two Step" and was "one of the most popular forms of contemporary social dance" as a Disco Couples Dance in 1978.
It is frequently danced to mid-tempo ballads in 4/4 time that have a characteristic Quick-Quick-Slow beat.
A classic example is the song Lady In Red Dance.