I fly from DCA on a regular basis -- its an older club, but the only one in the old Terminal A. Because most of my trips are out and back, its an easy stop to grab a muffin, some coffee, and an orange juice before braving security. Not having an airside club is irritating, but with a WC pass, you can usually cut to the front of the line.
The MSP and DTW clubs are fine for my purposes -- I just need a wireless connection, a quiet(-ish) place to put my feet up and get some work done. They work fine for me, and the 60-day pass is well worth the money. Coming in on the red eye from LAS, I do wish that MSP had a shower facility...