DJ Rare Groove spins for the crowd before Atmosphere's set. Slug's tidy ponytail gleams, silhouetted against changing red, green and aqua lights. He moves his body like he's got something to clarify. "Oh, you know this one too?" he asks the deliriously excited crowd, and of course the answer is yes. In Seattle, Atmosphere's emcee Slug--dark, emotionally tortured, pensive Lothario Slug--is a god. We seem to prefer our rockstars on the brooding but safe......