Floyd "Money" Mayweather Jr. mingled with fans and friends at the downtown club.
"Mayweather walked into the club handing out multiple $100 bills to Fluxx staff," a club spokeswoman said.
Screen Grabs: The Champ in Fluxx
The onetime welterweight champ was in town celebrating the birthday of his friend, P-Reala, who is the CEO of Philthy Rich Records, the spokeswoman said.