This was a question posed on the BUSLIB listserv: How much time do americans spr=end on leisue=re? Here are some of the amswers.
This document provides a webliography and bibliography of a sampling of sources dealing with a wide range of aspects of the use of free time and covers various age groupings in the sources cited.
US Dept of Labor (Bureau of Labor Statistics) publishes the American Time Use Survey (which is where New Strategist's American Time Use gets most of their data. I love New Strategist's books since they sort through all the massive amounts of data
MPAA study, esp. page 24. (That was my suggestion.)
The Statistical Abstract has this data, extrapolated from the VSresearch.