Do you have a grill. You can make good coffee in a pan. Just put some egg shells in and let the grounds settle before pouring.
Our power was out due to an ice storm for almost 2 weeks. You would be surprised what you can do without electricity.
We went without electricity for nearly a week during the "March Blizzard of '93", and actually the worst thing was that our water is from a private well, so we had none.
Fortunately we have a backup gas space heater (and a CO2 monitor).
Do you put the eggshells in before or after? (I hope this isn't the dumbest question you've ever been asked.)