We just got back from the Norwegian Star and yes, all rooms have coffee makers, however, I would suggest going to the Blue Lagoon on deck 7 and just getting your coffee as the coffee they give you are those prepackage round things.
The coffee is actually very good in all the dining areas. Also, you always can get room service to deliver you a pot of fresh coffee.
By the way, everything was really nice except the food. I've been on Royal Caribbean and Carnival and this definately had the least tasteful and not many choices compared to the other lines.
Don't get me wrong, we still ate everything and definately did not starve, it's just the food was average and the portions were very small.