Two days ago, after three or four hours of driving around town looking at houses, drinking Mexican lattes, and chasing cell phone signals, my wife and I decided to go to the gym. We were worn out, but if we didn’t get our workout time in, we’d have trouble justifying all the Friday night snacking we’d planned for later. That’s basic science. Our gym is a good place to exercise, but it isn’t perfect. They have nice, well-maintained equipment, but they also have televisions hanging from just about every available square inch of ceiling, all of them tuned to FOX News, CNN, ESPN, and A&E. Lucky for me, when…