A former Premier League footballer, now signed to Maidstone, gambled £16,000 using a card stolen from a pensioner, a court heard.
Ex-West Ham winger Blair Turgott, 23, is accused of withdrawing the cash before exchanging it for chips during a night at the Playboy casino in Mayfair.
Mr Turgott, who made one first-team appearance for the Hammers and is now signed to Maidstone, cashed out £900 in profit at the end of the night in 2016.
He denies fraud and converting criminal property at Southwark Crown Court.
Prosecutor Kaj Scarsbrook said the card used by Mr Turgott, from Bromley, was stolen from Peter Dixon, 85, on 30 September 2016.
The court heard Mr Dixon was called by someone posing as a Barclays Bank employee, who said he needed to collect the debit card so a new one could be issued.