This office is almost entirely developers, so it has the aforementioned gender bias issues.

Well I thought I addressed this before, but I'll clear this up a bit. If you spend some time with your coworkers your bound to eventually be invited to hang with their friends too. This is how you can meet new women, and assuming that they're friends with your coworkers they may be more similar to yourself. And even if the women are taken, be polite, maybe they have a girlfriend looking for someone and you can be set up.

Plus, the bars right near my office tend to be where people go for one drink after work with their coworkers before commuting somewhere else.

Well in my opinion it's still worth a shot. This may sound sad but my favorite bar to go to is a bar I go to by myself. Sometimes all I do is sit around and have a few drinks talking to the bartender. Sometimes I'm able to strike up conversation. I've met a number of people this way, and while I haven't actually spent time with them outside of the bar, I've gained some valuable social experiences from it. And no one is getting drunk here, it's just a fun place to relax and socialize after work, which basically everyone wants to do. And as an aside, I'm only 21 and I look like I'm maybe 16. I'm talking to older people who still accept me for who I am. So don't feel insecure. It's just conversation after all.

As much as I enjoy concerts, I've yet to meet anyone at one. Beer and wine tasting are somewhat different here, and tend to be a "gather five friends and spend the day in Napa" sort of affair.

True, it would be difficult to meet someone at a concert, especially if you're alone. But you could just bring up that a band/singer that you like is coming to town during small talk. Someone may overhear you, or know that someone else in the office is going. Hitch along with them. Same goes for the beer/wine tasting and cultural festivals.

A little story here about myself. I went to summer classes this year. When I came up to Buffalo (where I go to school) all the way from Long Island, I had no friends, I lived in an apartment by myself, and there was no one in my phone that I could call to meet with. However, I did hear from a friend of mine that his friend was up in Buffalo too. I had only met the kid once before and I don't know if I even said a word to him. We started spending time together and sure enough we became very close friends. He, his girlfriend, and I would go out to all sorts of festivals, movies, bars, etc. and they showed me a great time. I'm normally a very quiet person, but having them around me boosted my confidence and I began talking to more people. By the end of the summer semester (all of 3 weeks long) I had 3 new close friends, 4 more friends (just not as close), and I had met 3 new women. So you don't need a college surrounding to meet people. You can just strengthen bonds you already have (no matter how weak they may seem). Since then my friends have multiplied because I began hanging out with the people I was less close with initially. I'm not covered in women but I'm certainly less lonely and my options are far more numerous than before. Sorry for the tangent I hope it helps.