Often when we are photographing at night, there are times when people may say "Hey you have overexposed the image(because of street light usually)"
Is it really that important not to overexpose the image? In digital photography, if you want to recover the detail in highlight area, then the answer is yes, but ...
The question to ask yourself would be more of "Is the detail in that particular area important to the image you want to create, if not why keep it?"
Just blow it out, my friend ;)