In such types of gambling as roulette or slots don't have to think at all, and therefore gambler can be in almost any state, either under the influence of alcohol or sober - this will not change the outcome.
But in fact, there is a variable that will certainly change the outcome of the day in which the gambler decided to play, this is the bet and the desire to continue playing. It has been proven that drunk people do not want to stop, the ability to say a strict "stop" to themselves is inherent only to sober people.
And a person under the influence of alcohol will most likely increase the bet uncontrollably.
If someone gambles under the influence of alcohol, it's a matter of who will fall first: the gambler, who can't continue due to the excessive alcohol, or the one who runs out of capital due to uncontrolled gambling. Therefore, even controlled and sober gambling can still result in losses, especially gambling under the influence of alcohol.
This is something to avoid. Drinking alcohol can increase our focus and relaxation, making us calmer when making betting decisions. However, if consumed excessively, the opposite can happen and lead to chaos.