The Keeping Up With The Kardashians star hosted a bash at 1 OAK Nightclub at The Mirage Hotel and Casino in Sin City on Saturday night (22 November).
Scott dressed down for the occasion in faded jeans and a cosy cardigan, looking rather demure on the red carpet, but once inside the club he appeared to be having a good time chatting and dancing with his pals.
His appearance in Las Vegas came the night before US TV viewers saw him entering rehab on the latest episode of Kourtney & Khloe Take The Hamptons!
Filmed earlier this year, the episode showed Scott telling Kourtney he was thinking about seeking help for his out of control partying. He was seen leaving their New York home to seek help while Kourtney was in Los Angeles with their children Mason, four, and Penelope, two.
Meanwhile, while Scott was in Las Vegas, Kourtney was back home in Los Angeles enjoying a weekend of shopping and hanging out with her family.
She's due to give birth to her and Scott's third child in December.
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