They offer (real) poker at some casinos. It's standard NLHE usually 100-200bb max buyin, sometimes match the stack etc.

Most common game spread is 9-handed $200 max $1/$2 NLHE. It's exactly like the game on the link, except more players and lower stakes.

In the game, you try to win the money of the other 8 players, not of the casino. The casino takes a rake each hand, and a player with a large enough edge can overcome it. The edge might be you're excellent, or it might be they're terrible (or drunk). But the house gets paid to deal each hand.

In the long term, poker outcomes are determined by skill. In the short term, they're luck. In the medium term, both. Most people never reach the long term, it's a lot of hands.

There's also table games, similar to blackjack, that they call "three card poker" etc. These can't be beat, they favor the house. Standard table game, with a poker flavor. I've never played one of these.