Using the casino in the hotel, you can double your money when you win.
1. Select Roulette.
2. If you have 200,000+ money, select 100 as bet. If below, select 50. If you have less than 100,000, select 10.
3. Put your money to slots 1-18 to have 50% chance of winning. If possible, maximize the number of chips in a number. You should reach around 250,000 if you bet 100.
4. When you win, you'll get around 500,000.