The Hokey-Pokey dance has the singer explain to the dancers: “You put your (leg/arm) in, you put your (leg/arm) out, you put your (leg/arm) in and you shake it all about. You do the Hokey-Pokey and you turn yourself around. That’s what it’s all about.” 
 
“I was addicted to the Hokey-Pokey, but I turned myself around” is a jocular line about the novelty dance that has been printed on many images. “I joined a support group today..for those addicted to the Hokey Pokey- A real place to turn yourself around!” was cited on Twitter on November 20, 2011.
 
“‘I used to be addicted to the HOkey Pokey-then I turned myself around’ -Howard Feller @standupny” was cited on Twitter on December 12, 2011, but it’s uncertain if comedian Howard Feller was the first to tell the joke.
 
“What if the Hokey-Pokey really is what it’s all about?” is another joke about the same dance.
 
   
Wikipedia: Hokey cokey
The hokey cokey (United Kingdom), hokey tokey (New Zealand) , or hokey pokey (United States, Canada, Ireland, Australia, the Caribbean, Mexico) is a participation dance with a distinctive accompanying tune and lyric structure. It is well known in English-speaking countries. It originates in a British folk dance, with variants attested as early as 1826. The song and accompanying dance peaked in popularity as a music hall song and novelty dance in the mid-1940s in Britain and Ireland. The song was a chart hit twice in the 1980s - first by The Snowmen which peaked at UK #18 in 1981, and then Black Lace who reached #31 in 1985.
     
Twitter
Karen Rissling
‏@KarenRissling
I joined a support group today..for those addicted to the Hokey Pokey- A real place to turn yourself around!  lol 😉
9:12 PM - 20 Nov 2011
 
Twitter
Claude Call
‏@ClaudeCall
If I’m addicted to the Hokey Pokey and I go to rehab, aren’t they going to insist that I “turn myself around” as a result of the therapy?
1:08 PM - 12 Dec 2011
 
Twitter
Heather LeRoy
‏@heatherleroy
“I used to be addicted to the HOkey Pokey-then I turned myself around” -Howard Feller @standupny
10:27 PM - 20 Jun 2012
   
reddit
I used to be addicted to the hokey pokey…
submitted January 19, 2013 by thelastpeace
...but then I turned myself around.
 
WeKnowMemes
I Was Addicted To The Hokey Pokey…
– NOVEMBER 15, 2013
POSTED IN: MEDIA, PICTURES
I was addicted to the hokey pokey but I turned myself around
 
reddit
I used to be addicted to the Hokey-Pokey
submitted June 12, 2016 by SourCream22
But then I turned myself around