Billy McFarland (played by Ben Rappaport) is a convicted felon most famous for organizing the fraudulent music Fyre Festival by which he conned investors of almost $30 million by marketing and selling tickets for the event.
When Alan Reed says he almost got a tattoo of "Michelangelo's Vitruvian Man" once, he betrays his lack of art knowledge since the Vitruvian Man is actually by Leonardo Da Vinci.