Happened to me over a year ago, but still: Went to a disco with a mixed group. While men were required to pay about 15€ or so to enter, girls could pass for free.

I was a bit drunk already and this got me fucking furious. The whole group had to calm me down and my girlfriend was embarrassed. In retrospect, I should have refused to enter, but then again, this would have ruined the evening.

Anyway, how the hell is this even legal? This was in Spain, but I assume western country must have some laws in place that prevent from discrimination because of gender, and this is blatantly obvious isn't it? Also I have seen this in many countries, not only in Spain.

EDIT: I have x-posted this to /r/legaladvice in hope of getting a lawyers opinion on the legal side of this.