Scott Disick's problems with alcohol are the cause of the discord in his marriage to Kourtney Kardashian, a source told TMZ. Sources familiar with the celebrity couple said Kardashian threw Disick out of their summer rental house in the Hamptons, N.Y., in June because he drinks too much when he goes out clubbing. It wasn't necessarily the fact that Disick parties too much " he makes a nice chunk of change for his club appearances " but that when he drinks, he goes too far. The sources told TMZ Disick promised to lay off the drinking and so far so good. At a gig Saturday at Harrah's Pool After Dark, he didn't take a single drink, brining home $50,000 while he was at it.