Lamar Odom drugs was humiliated when he attempted to hit up Penthouse, a nightclub in West Hollywood on May 13. He was told he couldn’t come inside.

Lamar Odom wanted to go clubbing but he did not know that his ex-wife, Khloe Kardashian, and her new boyfriend, French Montana, were partying inside. When he got to the door, he was immediately stopped.

Lamar walks up to the door and has some words with security and the doorman. Then you see him walking away to his car with his buddies. But the red flag here is that E! cameras were reportedly there catching the entire thing, so was this staged?

But TMZ claims that the club was more concerned about Lamar starting a “brawl” inside club, and that’s why they didn’t let him in.

Meanwhile, Khloe, French, Kim Kardashian and Jonathan Cheban were all partying inside.

The decision to deny Lamar was the club's decision alone. We're told the nightclub wanted to avoid another bottle-throwing Chris Brown-Drake situation, so bouncers refused to let him in.

Sources close to the Kardashians tell us the same story -- Khloe didn't even know Lamar planned to show up.

You'll recall, Brown and Drake were involved in a massive brawl at W.i.P. nightclub in NYC back in 2012. The brawl resulted in a bunch of lawsuits ... and the club even lost its liquor license for a while. So it's no wonder Penthouse was playing it safe.

Just a few days before they were together in Atlanta, where French was hosting a party at an Atlanta nightclub.

French finally met Kris Jenner on May 7 at Nobu in Malibu, California. “They were all laughing and smiling and taking pictures after dinner,” a source told HollywoodLife.com. “They all seemed to really have fun and Kris seemed to genuinely like French.”