The couple, who are set to tie the knot on Sunday, were spotted at celeb hotspot Playhouse Hollywood on Friday night, toasting with tequila and dancing.
And they had some A-list company.
Leonardo DiCaprio, Jason Statham, Kevin Connolly and Mickey Rourke were also spotted hanging out together at the club, while the Backstreet Boys' Kevin Richardson celebrated his birthday and "Dancing With the Stars" pro Derek Hough hit the dance floor solo.
The night out was the latest bash in Khloe and Lamar's whirlwind romance, which began just a month ago.
On Thursday night, both stepped out for their respective bachelorette and bachelor parties.
According to E! Online, the groom-to-be was joined by "Girls Gone Wild" founder Joe Francis, Rob Kardashian, Scott Disick and Los Angeles Lakers teammates Ron Artest, Sasha Vujacic, Josh Powell and D.J. Mbenga for a dinner at STK before heading over to Guys & Dolls, where they celebrated with Ace of Spades champagne.
Khloe confirmed the wedding on Tuesday on her Celebuzz blog – just weeks after the new couple was spotted stepping out together earlier this month.
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