Interpol

Officially THE darkest gig I've ever had to shoot. I'm sure the 'first three songs, no flash' rule had a perfectly legitimate basis once upon a time, but is now used blindly and unthinkingly by bands' management, just because they can. It makes no sense at all when there's no light on stage to see the band by, let alone get usable photos which in turn will promote and publicise said band - and yet hundreds of fans just over my shoulder can pop their camera flashes away to their hearts content.
Sometimes people just don't want to help themselves.
(and if you're thinking "that pic above looks OK", it was one of only a very few that I could glean, and took some industrial strength post-processing to make it more than just a silhouette.)