Saw a tweet from a female artist saying that she never goes 50/50 on dates, and if a man hits going 50/50 she pays for both of them and then blocks him. I think it is a great power move because 100% this guy will be ashamed and feel humiliated. I once did something similar, when my male friend complained about coffee prices (2$ a cup or even less) and I just loudly said that I'll pay for his coffee too. Barista tried not to laugh in his face and later he told me how "terrible I made him feel".