Rounders has a young Matt Damon and Edward Norton and is entirely about gamblers making their living as poker players in the late 90’s or early 2000’s.

It’s pretty good

Edit: I just realized you said not entirely about cards, but I still highly recommend the movie. The plot revolves around cards, but it’s also about ambition and knowing when to cut off deadbeat friends

With all the context behind it I think the last scene of Star Trek: The Next Generation counts

Edit: Added link

The Hangover Casino scene

The Fizbin scene from Star Trek