The King is seemingly no stranger to treating himself to a beer when travelling around the UK and further afield on royal duties.
So it's no wonder that one keen royal fan invited Charles out for a pint while he was on his travels last year - and the monarch left the crowds in stitches with his quick and witty one-word response.
The incident came last August before he took the throne while the then Prince of Wales visited Birmingham's Victoria Square after being at the Commonwealth Games, the Mirror reports.
As he was spotted making his way through the crowds, a local man named Daniel Walker who was on his way to meet some pals for a drink took the opportunity to ask the royal to join him.
A video of the encounter shows Daniel shouting: "Charles, Charles, are you going to go for a beer?"
The Prince then turns round and replies: "What?" and when Daniel repeats himself, he cheekily replies: "Where?" leaving the other well-wishers in fits of laughter.
Daniel then suggests: "Anywhere, Albert's Schloss?" with Charles saying: "Thank you so much."
But the 32-year-old's encounter with the King didn't end there. He told Birmingham Live after the chance encounter: "I walked around and I could see his security guard wanted to speak to me.
"I introduced myself and he said if you hang out here you can chat to him. I waited around five minutes and Prince Charles came over and asked me what I did and shook my hand.
"He said 'good luck with your ventures'. It's changed my view of Prince Charles. I thought the Royal Family was stuck up. I am all about laughs and jokes. My mates thought I was lying."
King Charles is currently on a two-day visit to Northern Ireland with his wife Queen Camilla which is their first trip to the region since they were officially crowned at their Coronation on May 6.
The couple arrived at Hazelbank Park in Co Antrim yesterday and were welcomed with open arms by cheering crowds of fans.
They were serenaded by school kids and took some time to speak with the youngsters before officially opening the gates to the Coronation Garden.
After their garden visit, the royals moved on to Hillsborough Castle in Co Down which is the royal residence in Northern Ireland.
There they met with pupils from a local primary school who have taken part in a competition to design coronation benches and the monarchs later hosted a garden party.
Their engagements in Northern Ireland are set to continue today.
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