JDiver's right. The Centurion Club is the only one that has "real food" -- though, c'mon, it's a step or two above college! -- but other than that it's crowded, not peaceful, and not plugged in to any airline from an operations point of view. Others whose views I respect have posted similar opinions. Still, if food's the driver, the Centurion is most definitely the place for you.
If food isn't the be-all and end-all of your travel life, the D Admirals Club has the best views but does get crowded in the late afternoons. The A and C clubs are more peaceful; no views. All three have great furniture, which matters a lot if you're trying to work.
I wonder if they still have that $10 morning omelet bar at the D club?