A secret poker game you can play on the subway

The most obvious issues with this is that the game boils down to predicting passenger patterns, but you're still just comparing two RNGs, which is one of the worst kinds of games. I also don't think this can be called Poker, really. Poker is an imperfect information game, where your hand tells you some information about your opponents' hands.

It would be interesting to read HN's ideas on how you can simulate the shared information part of the game in such a scenario.

Is human behaviour not predicable enough for you? I bet passengers are more likely to congregate on the side that the door enters/exits, etc

You can definitely select a new hand each station by making inappropriate gestures or sounds.

I was waiting for the author to discuss actual strategies, like subtly herding new passengers toward a seat, sitting in your own row so you can get up when the right person comes along and graciously offer them your seat, saying "I think there's some spilled Sprite there" if the wrong person attempts to sit down (only if there are plenty of seats left, of course), etc.

Other ideas?