My brother, please quit wussying out, and next time be the man and ask her for her number. If she has any self-confidence, and any (ANY) experience with men, she probably expected you to do so. When you didn't, she probably figured you either weren't interested, or were a wussy. Some women want to see how badly you want to get with them.
I know it's tough. I know it's scary. I know it's nerve-wracking, and you're putting yourself out there, but it's what a man does. Here you've got the perfect vehicle to meet women, and you're not using it.
Why do you think women take dance lessons? Seriously, why do you think they do it? I'm not going to tell you what I think, I just want you to think about it.