There's an underground movement in community halls around Australia, of people congregating in the dark, in an anonymous fashion.
Flailing bodies move to the faint glimmer of a glow-stick or the moon peeking through a window, accompanied by the sound of shuffling feet.
Primary school teacher Shay O'Day has been given the green light to bring the movement to Thirroul, and she couldn't be happier.
From October 22, Railway Hall will be the Illawarra's third venue to host the weekly No Lights No Lycra meeting - a movement for dancing in the dark.
"The lights go down and you're in your own little world," Ms O'Day said.
"I still remember the first song I danced to at No Lights No Lycra [in Wollongong], it was Aloe Blacc's 'I need a dollar'.
"It wasn't one of my most favourite songs of all time, but you're in the zone."
The free-form dancer recalls her younger years - like that of many who frequented thumping night spots - of tipsy women throwing their handbags on the dance floor and forming a circle, in an almost tribal manner, to burn the floor.
Now she couldn't think of anything worse.
When I first explained it to someone at my work they asked 'is it in the nude?', no it's not in the nude.Karen Soderlund
The types of people who have joined the movement are lawyers, school principals, young people and old, men and women.
There is no alcohol, no drugs, just a desire to dance.
The Dapto chapter has one groover with a non-verbal disability, but comes along with his carer and "loves it".
Learning Support worker Karen Soderlund has been running the NLNL at the Dapto RSL hall for five years and never wants to stop.
From the moment she first stepped onto the polished floor at a Wollongong event, she knew she'd found a calling.
"When I first explained it to someone at my work, they asked 'is it in the nude?', no it's not in the nude," Mrs Soderlund laughed.
"I just love music and love to dance. I like the stress release, for an hour you're not thinking of anything else that's gone on through the day."
Sally Walker has been dancing her little heart out since the birth of the Dapto chapter in November of 2015.
"The anticipation for when I finish work on a Wednesday, I cant wait to get in my car, get home, have my dinner and go dance," she said.
"I love the fact there's not judgement ... and you can lose yourself completely."
If any ABBA songs begins to roll through the sound system, the hospital worker automatically assumes formation with her friends.
Their synchronized moves are so smooth, having danced the simple choreographed steps for many years, but it's their little secret in the dark and many would be none the wiser.
Andrea Self said she was lucky to get her husband to dance at their wedding, so NLNL was her outlet to do what she loves without needing anyone to hit the floor with.
"I come home and I'm still singing the songs," she said.
"You can go in and not be in the best of moods or had a bad day, but the music relaxes you."
The name of the movement might be "no lycra", but Mrs Self admitted she does turn up in the satin, stretchy garments - but no-one cares.
You're in the dark, so how would they know?
The NLNL movement began on a cold wintery Tuesday in 2009, when Alice Glenn grabbed a handful of friends for an unadulterated boogie in the St Marks Church Hall in Fitzroy, Melbourne, according to the website.
"We're under so much pressure all the time to look a certain way, and this just provides an opportunity for people to completely switch off and enjoy music and dance and be yourself," Ms Glenn said.
That small gathering under the light glow of heaters and portraits of saints, and the sounds of "Rien de Rien" by Edith Piaf, has grown to more than 75 locations around the world.
Due to COVID-19 restrictions, NLNL meetings may have limits on capacity, while some might charge a small fee to cover the cost of hall hire.
To find a group near you, visit: https://www.nolightsnolycra.com/
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