Loads of music fans have spent 100's of hours viewing old editions of Billboard mag online & downloading articles, record reviews, ads for new releases from down the years ........ well you can spend (waste?) additional time viewing old editions of the Miami Times newspaper online via the University of Florida web site.
It takes patience to find soul related stuff but there is loads of it on there if you keep searching.
Here's another ad for a show at the New Parisian Club (see Twans thread for earlier post of show here) ....