Bouris, who founded Wizard Home Loans, was reportedly at the renowned eatery when he was attacked by an unknown man.
NSW police released a statement that confirmed officers were investigating the alleged assault.
'While the investigation remains in its early stages we cannot comment further,' the statement read.
Fairfax reports Mr Bouris' office as saying the businessman was on a phone call at the time of the attack, and suffered only minor injury.
The businessman will star in a new Channel 7 series this year, which will follow him as he digs deep into the lives of business owners, offering practical techniques and tips.