Scott Disick Goes Psycho on Halloween, Parties in Vegas Without Kourtney (PHOTOS)

In honor of Halloween, Scott Disick partied it up in Las Vegas as he hosted an American Psycho-themed bash at the 1Oak Nightclub inside the Mirage Hotel and Casino.

But while Scott went wild, boozing it up, smoking cigarettes, and throwing dollar bills at the crowd, it became very apparent that he’d left Kourtney at home to take care of baby Penelope and 2-year-old Mason.

We hope Scott hasn’t gone back to his old hard-partying ways, and that he’ll be there for Kourt if and when those engagement rumors become true.