What is murder rock?

I really wanted to mock this because of its fabulous tag line. However I quickly realized I saw this band on Halloween last year, and it was really fun.  If you have been waiting to be a clown corpse, This might be the job for you.

MURDER ROCK BAND NEEDS BODY BAG DANCERS (pdx)
Date: 2009-12-21, 8:30PM PST
Reply to: gigs-3hjbz-1520696022@craigslist.org ^{[Errors when replying to ads?]}

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We are America's #1 murder rock band. We have been killing it in Portland and around the NW all year. We are looking to make our disgrace taste a little spicier. E-mail if you think you would like to debaucherize with us.

• Location: pdx
• it's NOT ok to contact this poster with services or other commercial interests
• Compensation: Free drinks, tips and plenty of rock & roll.