The singer, 30, admitted that she “used the wrong word” in her social media post describing the incident, which has attracted criticism on social media.
Glynne revealed on Monday that she and a friend were refused entry to the Mayfair establishment after staff “made a decision based on [their] appearance.” She also shared a photo on Instagram of herself wearing a grey hoodie, leggings, trainers and a baseball cap.
Sexy Fish’s dress code asks that customers do not wear “sportswear, beachwear, ripped jeans, flip flops, sliders or workout trainers.”
In a video posted on Instagram on Tuesday, following a considerable backlash on Twitter, Glynne conceded that it was “wrong” to describe the incident as discrimination, but claimed that she was treated in a “rude and disrespectful” manner.
She went on to state that she had shared her experience so that “they can better themselves.”
“I feel I need to come on here and pull up on what I posted yesterday,” she said.
“I used the wrong word, discrimination, it wasn't the right word, it was wrong but I wanna highlight the reason I posted what I did.
Glynne admitted she used the 'wrong word' (Instagram @jessglynne)
“Basically all I wanted to say is it was very rude and disrespectful the way the Sexy Fish staff were towards me and my friend yesterday and I don't believe anybody should be spoken to like that and that's what I wanted to highlight.”
Glynne then claimed she was “so understanding of dress code and etiquette” and that “being turned away” from the restaurant did not “bother” her, before adding: “What I was trying to highlight was for them so they can better themselves, there's ways of dealing with human beings and being respectful and having manners.
“Anyway let me know when it's safe to come back out.”
In her caption, she added: “Hi... Just want you guys to understand that I posted a picture of my attire as I was very aware of what I was wearing and it wasn’t about the dress code.
“I was out on a Monday afternoon and just passed by the restaurant and was blown back by the rudeness of the staff. Once again I used the wrong word for my explanation and I recognise that. Mistake.”
A spokesperson for Sexy Fish previously told Standard Online: “Sexy Fish supports individuality and style but respectfully ask all our guests to acknowledge our dress code which is published on our website.
"We are huge fans of Jess, and her music and feel sorry that she feels that she has been treated insensitively.”
The restaurant serves sushi and seafood and has proved a popular hangout for celebrities since it opened in 2015.