For those looking for a nice place to relax, if you are still flying through Denver and Atlanta, make a point of finding the display for the new lobby at Courtyard by Marriott. It includes comfortable seating, power ports (more than one for every seat), a table to work on, and the new Courtyard information board. Yes, this is an advertisement, but for a free open lounge it is quite worth it. I checked it out when I was flying out of Denver yesterday, and heartily recommend it for anyone that does not want to spend money on Red Carpet Club access.
As a fair warning, it does get crowded easily as travelers know to take advantage of it, and Marriott does have representatives who are trying to sell you on staying at Courtyard (but they also are giving out luggage tags.) In DEN, the display is located at the West end of Concourse B next to the Continental and US Airways gates.