Like many here have pointed out, loud music rules out talking. Which is why dancing comes in to fill the gap. I honestly have never taken a course in how to dance, but I can dance alright. The thing is, dancing requires confidence, if you think you look stupid, it'll come out in body language. If you don't have the confidence, do the shuffle. The shuffle is where you stand in a circle with some other people, move back and forth, and move your fists in a cicular motion. Its hard to explain, but look around at dances and you'll see lots of people doing it, just follow what they're doing. Shuffling allows you to fulfill people's need for you to "dance", without putting strain on your self-confidence.
If you can pluck up the courage to do so, ask a girl you talk to sometimes to a dance (note that this doesnt mean she'll be your girlfriend, although it can be a step in the right direction if you want it to be). To dance with a girl, you put your hands on her sides and she puts hers on your shoulders. Note: for the next few minutes, you will have to regulate eye contact with her. Don't stare, but don't keep constantly looking away either. You might be close enough (physically) to talk, if so, make smalltalk. While making smalltalk, glance away every few seconds(just glance, don't move your head) to avoid staring. When the song is over, it may be proper to give the girl a hug. Give a firm hug, but not a bonecrushing one. If she seems to be giving a very light hug, disengage. End the event with a smile, make some offhand comment along the lines of "it was a nice song", and get back to shuffling. This all may sound complicated, but trust me, its intuitive once you get started.