I will elaborate more.
Actually there's no magic trick in this world, by no means I meant "if you a real great dancer, you will be able to kiss her or sleep with her", because it would be a blatant lie.
I do believe that body language is more efficient than "spoken" language. However, it DOES NOT mean that if you start dancing/speaking body language with her, she will automatically respond more positively. Just like for spoken languages, some people can talk interesting and smooth, some people totally suck. Body language is just another way of talking.
But let's say, on the same level of smoothness, body language works better than spoken language.
- First, because most people socially resort to spoken languages, so people are less jaded with/used to smoother body language speaker. See how well good speakers are received, but how girls would just go crazy over great salsa dancers?
- Secondly, like I said, body language tends to be more genuine. It's really simple to tell a lie, but see how hard it is to fake something? Thus, instinctively, we human beings give much more credit to good body language talk compared to just "talk". That's also why we say "talk is cheap", "action speaks louder than words" etc...
One last thing regarding dancing: although techniques can be learned, it's your soul your personality that guides your dancing. You can take all the classes you want, if you don't enjoy it, don't do it. It's like for sopen languages. You can learn all the languages and words you want. If you have nothing interesting to say, you will suck.
And of course, the girl better knows your name, you better know hers. Some personal info here and there. But again, it's not absolutely necessary. Just ask all those players who go on trips abroad and don't speak the local language, who do you think they attract their women? Sure it's harder without words, but this just shows how "cheap talk" is just secondary.
If you really are only comfortable with words, then maybe don't go to places where there's loud music.
All this is only based on my own experiences and thoughts, it might be very biased. Just for the record, I'm a good dancer who loves the club scene. However my primary goal of going to clubs is to dance and have a good time, attracting chicks only comes second.