I play piano or read during power outages. I have plenty of LED lights to illuminate those activities if it's too dark to see. Also, sitting in the dark and listening to long-forgotten favorite songs on an MP3 player is fun.
Read, fancywork (Kevingg isn't the only paracord addict here), trombone, etc. Speaking of LEDs, I just replaced the bulbs on the old 2D incandescent flashlights with
1/2 watt LEDs. $9/each at Home Depot and I've got 25 lumen floods with a 40+ hour usable battery life and a massive spillbeam. Perfect for power outages.