I'm looking for a large scale survey of the general public's interest and time spent on all categories of cultural and media. It would report on regional and demographic differences. Does such a thing exist?
Commerce Departments conduct cultural census periodically. Check NYS and NYC. You can find similar information at the NEA National Endowment for the Arts website:
Here's an annual report form the Central Statistical Office of Poland: http://stat.gov.pl/en/topics/culture-tourism-sport/culture/culture-in-2014,1,7.html It's rather poorly translated, but I think you migh find some of their data useful.