This is the line of reasoning I used with my parents as a kid. Dollar per hour entertained.
But I think differently about it these days. I'm looking for maximum value per hour, with an eye towards minimal hours, and with a definite end point if applicable.
And value in this sense could be raw entertainment, but it could be something else, like exposure to new ideas and novel perspectives on life etc.
But I suppose that's what happens when you get older and you've got less and less free time to fill.