Well, I think this was entertaining but I feel there were some slight flaws.
As far as animating goes, you did a great job for the most part. However, I noticed while Kim was swinging her hips, the skirt didn't really move with her hips or animate, her butt clearly is moving away from the skirt. Perhaps, however, you meant to create the illusion she was not wearing a skirt, if so then great effort there for that kind of joke.
I did feel kind of sad for her though since apparently no one wanted to dance with her and instead wanted to have sex with her rather than dancing at wherever it is that they are. In that regards, sympathy for Kim has been shown as she clearly just wants to dance and the guy is making her go into tears. I imagine her pink haired friend didn't want to dance with her either, tis a sad day for Kim.
Although later into the animation she's clearly shown having taken her top off or someone ripped it off and her covering her breasts and crying because no one is still willing to dance with her and still just wanting sex.
The audio itself was pretty catchy and kind of made me want to dance. The lip syncing for the animation to the song was good. Did not see any real errors while she was trying to enjoy dancing.
The lack of a background is kind of sad. Had a background been added then there could have been much more to this sad tragic tale of Kim, a lady who simply wants to dance with people. However, given the premise, I imagine their at a dance club of some sort and she's possibly trying too hard to get people dancing with her.
Overall, I think this was pretty entertaining, sad, and catchy all at the same time.