Seems to me because Amy is a nurse specialising in the subject and also a Northern Soul fan,she is trying to join the dots between the two when there isn't one , as other people have stated most activities with fanatics could also attract people of the spectrum but it does not mean that is the reason for the attraction, just that like everyone else there was an initial starting place that led us in to the activity with the spectrum or without, Northern Soul usually the youth club,friends or older siblings with a love of the music