In some defined session on slot machines, each gamble has a statistical distribution of outcomes with negative expectation. A measure of the randomness of the outcome is the ratio of the standard deviation to the expection. When this is high (eg one bet) it is closer to a fair gamble. When it is low (a long session of betting in a casino), it is less fun, with loss increasingly dominating win in the overall outcome.
Many people have observed that the least bad gamble in a casino is to make one bet on a colour on the roulette wheel. There is slightly less than 50% chance of doubling your money and slightly more than 50% chance of losing it. A guy called Ashley Revel from London did this in 2004 with his entire net worth - having sold all his possessions including clothes. He doubled his net worth, invested his money in an online poker company, and it went down the plughole due to tightening of the laws in the US.
Order and randomness are not opposites, they are points on a continuum of existence.
Order can be seen in randomness and randomness emerges from order.
If not, existence would be static and void of possibilities.