A tourist in Ireland goes into a local pub and orders a pint. While sitting at the bar he gets into conversation with the barman and learns that it's a really close community who often meet and enjoy time together at the pub.
As they talk, a local stands up and the bar goes silent. "Twenty-four!" he calls out, before sitting back down, to which the establishment reacts with laughing and smirking.
Bewildered, but accepting he's foreign to the culture the tourist continues with his drink, when he realises that another regular has stood up, again to silence.
"Forty-one!" The pub again was filled with the laughter and giggling of those who understood what was going on.
Even more confused, the tourist called over the bartender and asked what on earth was going on. "Oh, that" the bartender responded. "The locals here are all so familiar with each other that when they say jokes they don't need to repeat the whole thing. Each joke has a number and they just say that". "Really?" The tourist was impressed. "Do you think I could try?" "Of course, you've seen how it's done".
Nervous, the tourist got to his feet, unsure of what to say. Silence exaggerated his anxiety.
"Ninety-three!" he called out, to which the pub exploded with laughter. People were rolling on the floor and choking on their drinks with laughter. The tourist hadn't expected such a great response, he leaned over the bar amidst the noise and said to the barman "Why was the reaction so crazy?" The barman replied "It's been a while since the folk here have been told a joke they haven't heard before!"