The problem was not whether it was a suitable occasion in-universe. The problem was that as a result of the situation there was no drama whatsoever.The editing and camerawork gave us an unfair advantage when it came to spotting them, and we wouldn't have known what was going on in the scene if we couldn't see what they were doing. And they're in deep space, in the distant future, in an alien casino run by an alien on an alien planet. Surely there's never been a more suitable occasion for space cards.
You make the point that it was space poker in the future in deep space with aliens on an alien planet, with space poker cards, yet after all that they use the terms "straight" and "flush" for what reason exactly? At least Battlestar Galactica got it right that, if you are going to do space poker, then you go all in with the space poker hand names (see what I did there?).
And the "twist" regarding the game also does not stand up to scrutiny. They're in a place where their tech is screened out and not allowed, yet Michael was able to smuggle some critical tech in after all and the security is so lax it can't even spot her planting it. Whatevs.