[SomeStupidPoint]

I play roulette as an adventure randomizer, and pay the casino a tiny sliver of the amount for making that more exciting than rolling dice in my hotel room.

Roulette is fantastic for answering questions like "Do I have a $50 meal or a $200 meal?" Simple: just place $50 on a column or dozen. Bam! Your cashflow is more or less randomly distributed instead of at a flat rate, for a 5% loss. Ignoring the casino's slight edge, you can see it's shifting money -- each of 3 days, you have $100, totalling $300; on a large number of games, you'll win 1 for every 2 you lose, so you'll have 2 days where you lose $50 and 1 day where you win $100. With the casino's edge factored in, you turn a consistent $300 in to a bursty $292.

Works for basically any time you're wanting to turn a flat, planned cashflow into a dramatic bursty cashflow.

Ed: maths is hard; fixed expected value. Accidentally applied casino's edge to total cash instead of just portion gambled.