The dancing duo – who are both married – were enjoying an “innocent” catch-up, a source told the Daily Star.
They said: “It was perfectly innocent… they wanted to have a few more drinks and the bar was still serving.
“There were other people, such as Bradley Wiggins, in the bar. They are just friends.”
Kelvin’s wife Liz was pictured without her wedding ring a day after pictures emerged of the pair.
But clarifying why she wasn’t wearing her ring, she said on Instagram: “That ring is heavy, it only comes out on special occasions. Oh and it was a fake tan day #Nodramahere.”