Ron Asadorian/Splash News Online
08/21/2012 at 03:00 PM EDT
That's one lucky hand!
took in a game of blackjack on Monday night at the Tropicana in Las Vegas.
"He was just having fun and fooling around passing time with other guests," an onlooker told PEOPLE.
Douglas's spot at the table might have been for more than just fun. The 67-year-old actor is slated to appear in Last Vegas
, an upcoming film about four best friends in their 60's who decide to forgo retirement and throw a bachelor party in Las Vegas instead.
Douglas will star alongside Robert De Niro, Morgan Freeman and Jack Nicholson. – Jennifer Garcia