During the rationing/coffee episode I had the same thought. The holosuite has to suck up energy; especially with the really in-depth detailed programs that the crew tends to run. Its not like they create a bar to play darts, they re-create books, go rock climbing, have interactive (is this the right term?) holopeople.... How does the replicator take more energy? Can't they solve their energy problem? With the different worlds/cultures they are interacting with you would think that they could at least fix some of their technical difficulties.