This is why i shoot RAW
If you have a DSLR you can shoot RAW instead of JPG. Why? Well, I think this picture is a good example why.
This night I was shooting the swedish band tAkidA at Kulturbolaget in Malmö. When shooting concerts you get the three first songs to shoot. Tonight the light-guy decided to use only red and blue spots during this part of the concert. If I had been shooting only JPG it would have been very hard to get usable pictures, the pic on the left is the JPG and changing that would have been hard and at the same time preserve the quality.
But since I shoot in RAW i could make some adjustments to the red/blue picture in Camera Raw to change the white balance and colorbalance to make the pictures usable.
So… allways shoot RAW!