Besides the default one?
I had a fully customised RGB palette. I mostly work in RGB. Now going back to the default CMYK for this one job, I find it very limiting.
I don't really have time to make a custom CMYK palette. Or is there a simple way to convert and RGB palette to a CMYK one? Even if the gamut is way off it would save me time instead of having to eyedropper things or mix the colours myself. :-S