Wanted to comment because there are a lot of posts on here that seem to promote some idea that the company has to really push for women-friendly policies/activities to be a great place for women to work, which I happen to completely disagree with (save for policies that could be classified as human-friendly such as leave and flexible hours).
I work at a mediocre startup (first engineering job, don't judge!) and therefore we have some trouble hiring people. We've got the ping pong and kegs, which I couldn't care less about, and plenty of brogrammers and other bromployees, but day to day those really are irrelevant if you're getting interesting work and have a good manager.
We absolutely have a diversity issue - I'm the only female engineer on a team of about 20, the company as a whole has maybe 1/3 women, it took the company about 6 years before they had their first woman go on maternity leave (many men are fathers, though their paternity leaves were short), and I don't work with anyone who would be considered underrepresented in tech.
Because we have trouble hiring, we've tended to get people who are super green but excellent coworkers, or who are great programmers with mediocre-to-awful people skills. Of the latter, 2 had very clear misogynist tendencies, and both were fired after complaints made by men. One of the two made my life really uncomfortable when I surpassed his skill level, but only for about a week and then he was fired. I didn't even have to complain - my manager saw it and acted immediately.
We don't have a very active diversity group, though we tried to at one point and it fizzled out. But honestly, my boyfriend works at a company with a diversity group and they do the most ridiculous, cringe-worthy activities that really do not make women look very sensible, unfortunately (arts and crafts, etc).
Basically, my company looks like the exact type of place you might want to avoid if you want a female-friendly workplace, but it's been a wonderful place for me to grow as an engineer. It has some major problems, but is really trying to take concrete steps to improve. I'd love to have some female role models and a more diverse group of coworkers, so please don't discount companies like mine for looking like the stereotype!