Flash? Or no Flash?
On one hand, a flash solves two of the biggest problems at night: it provides lots of light, and lets you work at a faster shutter speed. On the other hand, reckless use of a flash washes out everyone's features, and sometimes makes the subjects' eye bright red. It's a question that we all ask ourselves everytime we push that ON button on the back of the flash.
This morning, a coworker sent me the below photograph. It's one of the best side-by-side examples that I've ever seen of the difference shooting with flash, and without flash: