I personally like the smaller club rooms. You get much more personal attention than in the huge rooms in hubs. My three favorite Presidents Clubs (CO) are SFO, DCA, and SEA.
All time favorite airport lounge is the UA first class lounge at SFO. Extremely comfortable, terrific service, and great food.
I'm very much looking forward to cisiting QF's lounges at LAX and SYD on my travels to Australia this spring.