All bands need press and exposure. There are a multitude of fanzines (both traditional and online) that print interviews, review CDs and shows, etc. Try to hook up with one of these as a writer and/or reviewer, even if you have to do it for free at first. All of these fanzines and blogs need content. This will get your foot in the door and give you a calling card to have access to bands. Then, if you approach a band (either directly, through management, PR agent, etc) as a "journalist" and seem to know about the band and its particular scene (make sure you study your subject) - and not act like a wacky fan or stalker - you will be able to speak to the band and get your story. It all builds from there to one day maybe you will be writing for Alt Press or Rolling Stone if you stick with it.
Ben McLane Esq