Ritz Carlton Riyadh's plenary room was packed on the edge on Tuesday as guests awaited the arrival of U.S. President Donald Trump and Saudi Crown Prince Mohammed bin Salman.

US-Suldi Investment Forum attendees include the world's most powerful CEO, including Elon Musk nvidia'S Jensen Huang and Black StoneLarry Fink, to name just a few.

The event's safe guests (billionaire and junior adviser) all entered the plenary, awaiting suspense while Saudi and U.S. leaders met.

"We were locked in the plenary for three hours, and then they showed up," Tarik Solomon, head of the American Suni Chamber of Commerce in Riyadh, told CNBC. “Nothing says diplomacy like strategic patience.”

Guests describe the interesting scene as Fortune 500 executives sitting cross-legged on the floor due to a shortage of seats.

"They also put the CEO on the stage for the entire three hours, and they don't have anywhere to sit. So they're like sitting on the ground, literally sitting on the ground with legs crossed, talking to each other, and it's a fun scene," one attendee asked to be anonymous because they kept their professional restrictions when talking to the media.

The guest said: “This event is really not organized.

"It's amazing in that room. No matter what you think of Trump, he's a star. He knows how to work the room."

Trump stood alone on the stage while Lee Greenwood’s patriotic ballad “Proudly Being American” played on the speakers around him, then delivered a long speech of about 50 minutes covering our relationship with the region, but focusing on his family agenda and legacy.

Another attendee said: "I feel like I just attended my first Trump rally."

The U.S. leader devoted himself to most of his speeches to praise the Kingdom of Saudi Arabia, with which he has been enjoying warm relationships for years and made a state-owned visit during his first term at the White House in 2017.

"Riyadh has not only become the seat of the government, but also the main business, cultural and high-tech capital of the world," Trump said.

"Mohamed, do you sleep at night? How do you sleep?" he said, speaking to the 39-year-old crown prince, who sat directly across the audience. “Critics doubt what you do is possible, but over the past eight years, Saudi Arabia has proven that critics are completely wrong.”

The crowd praised Trump for saying, "He is your greatest representative, the greatest representative. If I didn't like him, I would have left here so soon. You know, don't he? He knows I'm fine. I like him-I like him. I like him very much."

Bin Salman sat on the president, often holding his hands in his heart in an admiring posture.

"That's why we give so much," Trump smiled. "I like you so much."

Saudis on social media are proud of their de facto leader’s relationship with the U.S. president, and regional analysts point out that there is a clear difference between the administration’s relationship with the Kingdom and the Biden administration, which is even cooler.

"Trump and MBS? This is a brave man for the times."

The main news of the event was the announcement that Saudi Arabia invested $600 billion in the U.S., including a $142 billion deal to buy U.S. weapons.

"Overall, the mood was very optimistic," said Solomon of the American Chamber of Commerce. "The right people were in the room, and the deal performed less. Probably because they confirmed $300B+ in the actual agreement, rather than splicing the flashy $1B headlines together."