What's an unethical way that people save money?

I work downtown, in a city where monthly parking is easily $150 or more per spot.

My wife and I both have to drive due to schedules, so it would be double that.

Found out that the casino downtown gives you free parking daily if you bet $10.

So we go and play roulette daily.

She bets $10 on red and I bet $10 on black,

and each ask for our parking validation. One of us always wins, which doubles one of the $10 bets. So we get our $20 back. Boom, free parking. There's been the odd time it's hit zero.

In that case, we each just lose $5 each and parking costs us $10 total for the day.

I accidentally discovered that the laundry machines in my building take 20 euro cent coins

instead of the $2 coins. The last time I was in Germany, I saved as many as I could and now

a load of laundry costs about 50 cents instead of $4. Imagine the laundromat owner going to collect the change.

Ooh, the frick is depositing euros.

I only found out about it when I paid $2 into the machine and it spat out the 20 cent piece.

So somebody else out there is doing it too.

They'll never catch me.

I went to Thailand and the 10-bought coin looks nearly identical to the two euro coin,

so I took a few. If I'm on a festival or in a club, I sometimes pay with them because everything

is overpriced and dark anyway. I just don't use it in normal shops. They're around 25 euros

each, so it's a great return on investment. I don't get how you guys are able to use similar

sized coins and vending machines. I have enough get how you guys are able to use similar sized coins and

vending machines. I have enough trouble getting the machine to accept the actually correct coin

whenever I try, let alone one that's a bit different. I never got removed from an employee discount

...