Having mingled in the foyer and enjoyed a celebratory glass of champagne, the past pupils headed to nightclub Time, where they were treated to a delicious three-course dinner consisting of chicken supreme for mains and 'death by chocolate' dessert.
The Debs Awards were a talking point, with 10 gongs being distributed. "The awards were really funny," Nicole McKenna said.
"But I don't know if some of my former class mates would like the titles printed!"
With all the awards handed out, everyone made their way upstairs to a private room where they danced the night away.
"Event company Plan My Debs had helped organise the night," Nicole said.
"The DJ started playing old songs and we all started dancing."
According to Nicole, 1974 disco classic Rock the Boat got everyone moving. "It was great - everyone was sitting on the floor doing the dance moves and taking hundreds of selfies."
Things began to wind down around 4am.
"We were all given a breakfast roll and then we got back on the buses and came back to Dublin."
Busting moves on the dance floor certainly took it out of the guests. "I am still recovering," Nicole said.
"I was absolutely wrecked, but it was a fantastic night and lovely catching up with old friends and hearing what everyone is up to next."