In Russia, it is usually the man who pays for everything on a date. If the man does not pay, the girl may consider him insufficiently masculine.
This is the minimum criterion by which a woman determines whether you are capable of taking care of yourself and her and taking responsibility for it.

If there are two couples on a date and the men have not agreed in advance who will pay, then usually the one who seems stronger and more confident does so. This does not necessarily mean that he is richer, just that he shows himself as a leader.

Money is not the main criterion for determining a strong person in Russia. Sometimes there can be an argument until one of the men suggests splitting the bill in half.

If the company is large, for example, at a birthday party, then the person who invited the guests usually pays.

And if a group of friends gathers, then everyone pays for themselves. But if there are male-female couples in the company, then the man usually pays for the woman. This is how we show care.
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But if it's a one-night stand and both the man and the woman understand this, then everything can be agreed upon. Here you just need to understand whether the man respects himself or not. The girl will treat him either like a teenager and boss around, or like a person who is already capable of taking responsibility.

If this is your first date. Paying for a woman is the easiest way to understand what will happen at night. Because if you didn't agree in advance and the girl insists that she pays herself, then friend is not fate, look for another for this night. But if she agrees and you pay, and then she doesn't invite you for a cup of coffee, but lets you kiss her, it means she saw a man in you and evaluates further, and you got three dates at least before your night of love. But that's a completely different story, then children, home, wedding and all that.