A group of Donegal supporters at yesterday's GAA match against Antrim in west Belfast tried jokingly to pay the entrance charge in pounds instead of sterling.
"Can we not pay with punts, sure we're on the way to a united Ireland now," said one young man wearing a conical hat in the yellow-and-green stripes of the Donegal team.
The match in Casement Park was a family day out, with children in prams eating ice creams and young boys and girls chasing each other around the concrete terraced benches.
The west Belfast MP, Mr Gerry Adams, was seated in the covered terrace wearing an open-neck blue shirt and navy blazer. He signed programmes for young boys who came up to him, while keeping a close eye on the match. A few people sought him out to shake his hand, but mostly they treated him as just another punter rooting for Antrim, the underdog team in the first round of the Ulster Championships.
Casement Park in the heart of nationalist west Belfast was flashed on television screens around the world in 1988 when two British army soldiers were stripped and beaten there before being shot dead by the IRA. The soldiers had apparently blundered into the funeral of Kevin Brady, an IRA member and one of three men murdered a few days earlier by a loyalist gunman, Michael Stone.
Graffiti daubed in red on the park's exterior walls reads: Disband RUC. Inside, as people took their seats for the match under grey cloudy skies, supporters of both teams were united in their backing for the Belfast Agreement. Many acknowledged that a crucial first round in the game of peace had been won with the ratification of the agreement, but that there was still a lot to play for.
"There was no euphoria yesterday, but people are happy," said Robert from nearby Andersonstown who was at the match with his two sons, aged 10 and six. "I think people are more cautious now and they'll just take every day as it comes and I hope it will work out."
Robert, who works in Dublin, said there was "an awful lot to be gained politically from the agreement. The equality agenda would be very important for people here and when that happens it will end injustices that have happened over the past 30 years and peace will become a reality then."
At half time, six members of Sinn Fein youth did a lap of the perimeter of the pitch, carrying banners which read: "No Change to Rule 21" and "Disband the RUC". Rule 21 excludes members of the RUC and British army from membership of the GAA.
Mr Paddy Campbell from Aghagallon, Co Antrim, said the Yes vote was "a step in the right direction". On the unionists who voted No, he said: "If they had moved Buckingham Palace to Shane's Castle in Antrim, they'd still have voted No."
His friend, Joe McStravick, who also supported the agreement, had little praise for the UUP leader, Mr David Trimble. "A man that stood with Billy Wright who killed Catholics is now telling me what way this country should go. You tell me that that man is going to lead us into peace? No way."
A Garda sergeant from Donegal who also voted Yes said the passing of the referendums was "just a beginning". He predicted that sporadic violence with splinter terrorist groups would continue. He also suggested that gardai could be drafted into nationalist areas where the RUC does not have the support of the community.
He said: "I think the extreme unionists will do better in the elections than they did in the referendum and that Trimble will have his work cut out to hold on. I would hope that those unionists would think with their heads in relation to the prospects for investment in the economy. When they realise that, they might just side with the moderates.
"I don't think they could be stupid enough to throw it all away just for the sake of throwing it away because there's no light in a No position."