“Can we validate your parking, sir?” was the question posed as I paid my dinner tab this evening here in Nashville. I said “No, thank you. I’m walking.” As the waiter walked away I tried to come up with a cheeky response about validating my walking, but alas I’m not too quick on my feet. After all it was a pleasant, chilly evening, and I had a pleasant walk back to my hotel. Burning off a little dinner and getting some fresh air is enough for me – I don’t ask much. The walk got me thinking, as walks tend…