It might sound like an oxymoron, but Interpol like their lights dark. I'm almost surprised they didn't use blacklights.
Lots of deep blue washes for this set. When one color dominates a treatment, exposure can be a huge challenge, and for more reasons than just the technical.
For me, exposure with live music photography isn't necessarily about capturing the ambient conditions as they were observed. If that were the case, there wouldn't be all that much to look at in these photos.
What I find most important, more than strict adherence, is producing an exposure that best portrays the band. This means straying from a technically accurate exposure of the light and tweaking the color balance as needed.