That's about the minimum amount of time it typically takes to take part in one of my extracurricular excursions.
Golf... that's easy, 18 holes = 4 hours.
Biking... well, it's gonna have to be at least 40 miles to make it worth while, and the standard Aledo loop is 60 with a stop about half-way to grab a Gatorade at the gas station off 1187.
Running... though I've scaled back the bigger stuff, I still like to put in some decent double-digit mileage on the weekends.
Eventually, something's gotta give....