Aside from National Lampoon Vegas Vacation, it would be in back alleys. It’s not a commercial game because it’s not exciting enough and it would be easy enough to fool with a machine (also the paper at hand). I just didn’t expect it to be so biased for actual people flipping coins.

I seem to have confused people. I just thought there was a different understanding and didn’t want to explain gambling.

What I meant to express in “the house always wins” is that in games of chance, you’re always at a disadvantage. That’s how the house is statistically guaranteed to make money when played at a large scale.

Roulette has red, black, and the green one.

A “fair coin” is a mathematical abstraction. There’s zero probability that actual coin flips are “fair”, in the mathematical sense. What I was expressing was the fact that this is way larger of an effect than I expected and, over time, this effect will change things that use coin flips.