Group photo walks rock. This is the first time I've done one at night, though. I left my tripod in the car, so high ISOs and a wide aperture were required.
If you're looking for an excuse to go shoot, find a group of people and organize a photo walk. Not only is it more fun to shoot with a group, it tends to be a bit safer, too. Especially if you like to shoot the seedier parts of town.