Hey, maybe you can sue all those places that give senior citizens discounts or the ones that give free admission to children. Let's end all discrimination. In fact, let's just drug everyone and end all thinking.
Your FR credentials are noted, but you sound like those people who want gender neutral restrooms. Puh-leease. Tell me what night single men flock to a popular bar. If they are normal, it's on ladies night.
Although I’ve been to plenty of bars and clubs I’ve never attended a “ladies drink free night”, but some men feel the need because they are fat, ugly or stupid and couldn’t possibly get a “date” unless the victim was inebriated or unconscious.
BTW - I do believe any kind of price discounting due to age is a flat out in your face violation of not only anti-discrimination laws but the equal protection clause since government engages in the same kind of practices as some business.