The overhead lights in our bathroom, bedroom, Rob's office and front porch are on the same circuit. They'll work fine for a while and then just stop, forcing us to use the Christmas lights Rob rigged up a while back.
We finally figured out the lights will work as long as we don't have more than 2 light bulbs on at a time. If we accidentally turn on more than 2, we haven't figured out how to make them start working again -- turning them all off and turning on just one doesn't motivate them to light up.
A couple of weeks ago, when the lights were on strike, we accidentally left the bedroom switch in the on position. They decided to work again at 4am. While we were thrilled they were back, we weren't so happy to be woken up in the middle of the night.
Now, whenever we want to turn on a light, we find ourselves saying things like, "I need to turn on the bathroom light, so I'm turning out the bedroom light." Ridiculous!