Ryan's bar in North London is a popular spot for many living in and around Stoke Newington.
On the evening of our visit, there is a group of chess players taking part in a tournament downstairs, a meeting of dog walkers upstairs, as well as the usual mix of punters, young and old.
Bar owner and Waterford native Ged O'Sullivan is in high spirits, despite being one of the countless pub owners across Britain who are grappling with a supply shortage for Guinness - the most popular beer in Ryan's and many pubs across Britain.
"About three weeks ago, when we went to put in our beer order, they told us that there was a shortage. We could only order less Guinness than we normally order," he said.
"We asked why, and they said that there was a shortage of supply," he explained.
Diageo, which owns Guinness, has blamed "exceptional consumer demand for Guinness in Britain" for the supply challenges it now faces.
According to the food and drinks research company, CGA Strategy, the iconic Irish stout is becoming more and more popular with younger age cohorts.
"Guinness has seen quite a bit of growth over the past few years. It's now, by volume, over the past 12 months, the biggest beer in Britain. It's seen a bit of an explosion really post-Covid ... and it's across a lot of demographics which is really interesting," Chris Sterling of CGA Strategy explained.
It's something that Mr O'Sullivan in Ryan's can also attest to.
"Even in the last six months the sales of Guinness have gone even higher. We think it's through social media, TikTok, Instagram and those things. And especially the trend where they're drinking as far as the G".
One of his bar staff, and occasional customer, Laura, says she has noticed Guinness becoming the drink of choice for many young people her age.
"I think it's because people have seen each other drinking it. So yeah, and also celebrities like Charlie XCX and Kim Kardashian," she said.
In Fitzrovia in London, where Irish pub 'The Hope' is located, the owners have pushed some of their other Irish products to mitigate against the supply constraints.
According to Philip O'Sullivan, a co-owner of the pub, he is seeing sales of Murphy's stout climb.
He said: "Thankfully we had a bit of foresight. We'll say we had foresight anyway! We've got two options and so we've got Guinness and Murphy's.
"I'd like to say that Murphy's out-sells Guinness most weeks here".
According to Diageo, the island of Ireland will not be impacted by the supply constraints.
In relation to its supplies in Britain, a spokesperson for Diageo said that "we have maximised supply and we are working proactively with our customers to manage the distribution to trade as efficiently as possible".
