The ornamental design for a sleeperlounge, as shown and described.
FIG. 1 is a perspective view of a sleeper lounge having a sleeper bed disposed in a sleeping position;
FIG. 2 is a top view of the sleeper lounge showing an L shaped armrest on a right end of the lounge with an L shaped armrest and an extension lounge on the left end of the lounge;
FIG. 3 is a front view of the sleeper lounge;
FIG. 4 is a rear view of the sleeper lounge;
FIG. 5 is a right side view of the sleeper lounge; and,