The "Keeping Up with the Kardashians" star tells People Magazine that he only planned to stay at the treatment center for a week.
"The funny thing is, a lot of people were under the impression that I was going to this rehab facility in Costa Rica for a month, when the truth was, I was going for a week for one treatment that they have there," he told People. "I'm not done. I plan to go back to this place."
To his credit, he drank water and Red Bull all night.
His evening started with dinner at Stack Restaurant & Bar before walking the red carpet at the nightclub. Fans mobbed the scene, trying to get a glimpse of "Lord Disick" before he entered the club.
He even shouted out, "Who is ready to party with The Lord? Let's get ready to tear the roof of this place!"