it just looks like raver style. however the thin strapped tops are because you get REALLY hot dancing in those outfits. they layer them up. i'm a dancer at a con and even though i'm wearing like only 2 layers by the end of the night your still sweating
usually you pick a theme for the outfit. mine was rainbow themed, we were using the raves themed so mine was a dark rainbow. you can do one color. or pick a character to base it on, or even use an animal. one of my friends did a "bunny" rave, where she had a special hat made with long pieces of fabric to represent the ears.