According to the New York Times, Smith treated a group of more than 30 people, including several other Vice executives, to dinner at Chef Jean-Georges Vongerichten's Prime Steakhouse. Some bottles of wine cost more than $20,000.
Though Smith's net worth has been estimated to be as much as $400 million, he also dipped into more recent earnings to cover the $300,000 bill.
According to teo guests who confirmed details of the dinner to the New York Times, Smith won more than $1 million gambling over the course of the week at CES. He was especially lucky at the blackjack table, the sources said.
The Times notes that MGM chief executive told an analyst from Nomura Securities: "$300,000 for dinner at Prime. That's a pretty good check. You would have liked the wine, Harry."
The Vice CEO is known for his antics. At Vice's holiday party in December, he reportedly stood on stage and delivered a $1,500 cash bonus to each employee.
Smith did not immediately return a request for comment.