Dir En Grey Playing Men-Only Show

Apparently Dir En Grey are playing a show only for the men out there and will be checking gender at the door to ensure that no women get in. This brings up one major question.

Who the fuck is Dir En Grey?

Okay, apparently they are a Japanese band that attempts to blend various metal and rock styles. This brings up the question as to why they would be playing a men-only show and my answer came upon seeing this picture:
Those are all men. Ah, the mysteries of life finally solved.