The room is small and upstairs in the old man, Mr. Charrington's, store. Winston likes it because it reminds of days gone by--it is unlike his own cramped apartment with the telescreen. One of the first items Winston notices besides the comfortable--looking bed is the picture mounted on the wall of the Golden Country. He is drawn to the picture because of its idyllic setting and because it represents a pre-revolution, pre-war era, a time period in which everything did not seem grey.
When Julia comes to the room to meet Winston, she brings real coffee and other luxuries that only Inner Party members are entitled to. So, the room in combination with Julia's presence and contributions represents a sanctuary for Winston--one which exists away from Big Brother's eyes and Party dictum (or so Winston thinks!).