Go for a show, stay for the . . . show. The black exterior of this corner bar more or less previews the sparse, dark interior. But ambience and mood lighting are not the characteristics that have drawn crowds to the place for decades. The 400 Bar is a music landmark here in the Twin Cities, attracting up-and-comers, living legends, and the occasional big name—all for a low cover charge. Prepare to talk tunes with other music-minded locals, grab a Pabst Blue Ribbon, and you’ll fit right in.