Ah WR, you continue to be teh awesome to my days.
Well, my wife is a typical young attractive female with few geek interests. I can tell you that she loves gossip. Buy some Ok!, Us Weekly and In Touch magazines and read up on celebrity gossip. Bring what you learn into conversations. This is actually easy prep work. Gossip is only ever a week old, so if you're going to a party, buying the current week's issue, reading, and conversing on topics you have just read is all you need. Information backlog is irrelevant. As these magazines come out on Fridays, and parties are on weekends usually, you can buy it, read it on the way to the party, and possibly have gossip so fresh the girls haven't heard about it yet. INSTANT win, for sure. This WILL work.
I don'T recommend gossiping about actual people you know. While this will definately get female attention, you are unwittingly getting into complex female politics that can have you suddenly on someone's "side". Don't go there, it's not worth it on long term.
You can however discuss reality TV. This works great too. If you can hold a gossipy conversation about The Bahcelor, The Biggest Loser, Survivor, etc, you are bound to get a female interested. The downside is that you have to watch these shows in order to discuss them. IMO, not worth it.
Females also like fashion. If you talk about where you bought your clothes, and how they were on sale, you will appear intelligent. Intelligence is measured by how much money you save by picking the right sales, nothing else. Oh, and when you buy something on sale, you do not "save" money. You "make" money. This is crucial to understand. Other generalizations about girls may not hold true, but "making" money when buying stuff on sale is universal.
For slightly older females - late 20s to 30s - talking about cooking may also reward. You can somehow drop into conversation "the other day I made this incredible osso bucco...". If one girls goes "You cook?" you may have a bite, and can continue talking about cooking. If you do not actually cook, you cannot use this. You may however take the neophyte cook approach and say how you tried a recipe and it failed, and ask whomever shows the most interest her advice on how to succeed. She will find you cute and disarming, and you will get into the trust zone quickly.
As you have noticed, some subjects are of GREAT interest to women, but men cannot use these subjects. Make-up, hair styling experiences, etc. As much as it would seem like a good way in, you just can't use them, sorry. Unless you're gay or want to appear gay, but that won't get you were you want in the end, so no good.