On the way in, he was asked for an update on his recently postponed exhibition boxing match with Logan Paul -- is it still going to happen?
"I know it's going to happen," Floyd said ... "We just want make sure everything is right and everything is where it should be."
Inside, the party was wild -- tons of food, live music, booze, and hot ladies on rollerskates to entertain the crowd.
The venue is called "The Venue" -- it's a massive 32,000 square foot event space "outfitted with the most advanced technology in sound and lighting, special effects including laser capability and 3D Projection Mapping," according to its website.
In other words, it's super high tech.
Celeb guests included Rick Ross, Larsa Pippen, Jacquees (who performed) and President Joe Biden's brother, Frank Biden.
Floyd's cake was pretty cool too, complete with money and a private jet ... he shared the party with friend Jas 'Limitless' Mathur who plunked down $700k for the bash. We're told there was $200k worth of champagne, ice sculptures and dancers to complete the vibe.
We're told there was a COVID protocol in place -- people were screened at the door, temperature checks and an emphasis on social distancing.
That said, Floyd did not appear to be wearing a mask at any point of the evening.