Another guilty-pleasure disco-era line dance!  This is one I’ve actually used regularly as an easy cool-down dance at the end of my own practices for the last couple of years.  The source is The Official Guide to Disco Dance Steps by Jack Villari & Kathleen Sims Villari, 1978.  There’s no special music for this or any other line dance, but I often use either Wild Cherry’s "Play That Funky Music, White Boy" or Donna Summers’ "Bad Girls".  The only thing even mildly unusual about the dance itself is that instead of quarter-turns after each repetition there are half-turns.

The New Yorker (20 beats)
1-2-3-4
Touch R foot forward-close-forward-close

5-6-7-8
Triangle: touch R foot forward-side-back, then close with weight

9-10-11-12
Triangle: touch L foot forward-side-back, then close with weight

13-14-15-16
Dips: touch R foot behind L, bending left knee, then close R to L with weight; touch L foot behind R, bending right knee, then close L to R with weight (think: back-close-back-close)

17-18-19-20
Grapevine right and half-turn: step side R, cross L behind, side R, half-turn right (clockwise) and close L to R, ready to restart

Repeat as often as needed to fit the music, turning halfway (180 degrees) at the end of each repetition.