When I picked up the first book of Martin's series (A Game of Thrones), I could hardly put it down. I stayed up through a 24hour cycle just so I could finish it.
I "lucked out" when I first started reading this series last fall. I was unemployed, so I was job searching/interviewing during the day, reading Double R till the sun dawns, then going to sleep. The books are so good; I think I set a personal "pages read in a day" record of 400 pages with Storm of Swords. The majority of which were read while my roomate was getting a tatto at Last Rites here in NYC, where they play gloomy atmospheric stuff mixed with all-things-metal. It fit the atmosphere of the end of that book almost too well!
Dance of Dragons needs to come out NOW!