The young couple were spied on at the private members’ club in central London – pressing their lips and kissing at the end of the night.
According to a source, the duo have known each other for years, but Roman had a three-year relationship with Swiss scientist Anne-Sophie until last month.
Roman announced his relationship with Anne-Sophie ended on July 17 – but now sources claim he was shutting his lips and enjoying a date with Lottie 10 days later on Monday July 27.
A source told The Sun on Sunday: “[Roman and Lottie] have known each other through the holiday circuit for a few years, but nothing has ever happened before.
“Roman always thought she was beautiful and decided to take the courage to invite her out.
The source went on to suggest the date was a smash, whispering, “They had a really fun date, very drunk and have been in touch every day since.”
Last month Roman confirmed he broke up with Anne-Sophie during the lockdown and a few months after they moved in together.
The star – who was at I’m A Celebrity… Get Me Out Of Here! last year – had told listeners to his earlier locked-out Capital Radio show that he and Anne-Sophie had a fight when she ate some of his crisps and didn’t replace them.
He had previously hinted that he was considering marrying her after dating on Tinder.
Roman said in a previous interview: “Is she the right one? Who knows. We never know! But it’s love, 100% and I’m committed to it. I hold on to her.
Meanwhile, Lottie’s former boyfriends include George Lineker and Made In Chelsea co-star Sam Prince.