In order for younger people to travel somewhere there has to be a buzz about the location / event and it has to seem really hip. Old northern soul events that have been going on for a long time and which are populated by older people do not seem hip are not going to attract young people. In Chicago, the "Windy City Soul Club" has a hip reputation as tons of younger people come out to dance to a whole new genre (to them) of great sounding music. It also didn't happen instantly but now they always sell out. Their events start at like 10, last time I was driving by their event at midnight there was still a huge line outside of people who wanted to get int (and it was very cold).
If someone manages to spin a genre of music that actually appeals to younger people (and there is plenty of soul and funk that would), create a scene around it, and have appropriate / hip venues, I'd imagine a new generation might get into the music.