into "partying" to me infers being into socializing with others, as that is what "partying" is, in some sense of the word. To truly enjoy it, is to have grown up associating and testing / honing ones ability to commune and socialize with your fellow human beings.... To be socially inept / aspergers-eque is to, on some level in my opinion, dislike the way people socialize or see something abhorrent in it...
...unless I am going too far and by "partying" you just mean the hedonistic use of drugs and pleasure like sex/masturbation etc.
To many I would imagine drugs would be an escape from inadequacies, so social ineptitude would indeed be one among those many escapes to which drugs find their way to "help". It makes sense that many non-social drug users do so for that very reason; that they are ill-equipped to manage with what socializing entails.
I am one of those to a degree: I certainly wish to express myself in person better than I feel I can a lot of the time. I am overly verbose when it comes to the written medium so here I am as I come across in that convoluted context; which is flawed in the opposite manner and often not very concise and just plain badly written from a rambling mind. ;-P