A visible garda and security presence kept parents' minds at ease last night as their children celebrated their Junior Cert results.
For more than 61,000 youngsters across the country, it was a chance to let their hair down.
A number of venues across the capital, and the rest of the country, opened their doors offering a range of alcohol-free parties for teenagers.
Young girls were enjoying what for many was their first night out and an opportunity to dress up while young boys wore T-shirts and walked in groups of three and four.
Many of the youngsters were on their best behaviour under the watchful eye of gardai and security staff. Security was tight on the door at the Wright Venue, in Swords, and the Tamangos nightclub, in Portmarnock.
Ann Nolan, from Artane, dropped her daughter Grainne (16) off at Tamangos and said she was proud of her girl.
"It's nice to see everyone and meet my friends tonight," Grainne said.
Her mother said: "I'm very proud. She did very well in her studies and I was down meeting her outside school today.
"Tonight brings me back and I love to see her having fun with all her friends."
However, other teens elsewhere weren't as well behaved - with one bus driver saying he was forced to clean up vomit and pick up bottles of vodka, as well as countless cans of cider on his bus.
While parents dropped their children off near one city venue, the bus driver - who didn't want to identity himself or the private company he works for - said he had experienced one of the worst nights on the road.
"I will never do this run again," he said.
"We've come from a town just outside Dublin and I can understand the kids want a night out but it was bedlam on this bus.
"A lot of them were visibly drunk and that was boys and girls. They were drinking when I picked them up, so I don't know how their parents couldn't know.
"I did this run last year and it was fine but not this time. I'm a nervous wreck. There is no way I'd do this again."
Gardai didn't report any major incidents last night.
Along with Tamangos and the Wright Venue in the capital, the Hub in Kilkenny and Neptune Stadium in Cork were among venues putting on student discos for celebrating youngsters.
However, strict no drinking polices were enforced, with Tamangos manager Rob Brown insisting that "everything is above board".
He also told the Herald that the club had planned "more security than the Electric Picnic" to stop teenagers drinking.
The HSE had issued a warning, insisting that "alcohol should play no part in celebrations".
It came after alcohol watchdog Drinkaware warned students about the effects of drinking on their long-term health. Drinkaware chief medical officer Dr Liam Twomey said: "We are talking about young people who are about 15 years old.
"This is simply too young to be drinking alcohol and the harms associated with drinking from such a young age cannot be underestimated."