One place – all about jazz
Oslo says: 
You would probably never find it, if you didn’t know it was there. The CD-shop and cafe in Grensen 8 gives you jazz all day long, and sometimes late night live concerts, too. Bare Jazz – means Only Jazz – is run by the saxofonist Bodil Niska and her enthusiastic friends. You will find all the jazz CDs you long for, lots of knowhow behind the desk, and a decent range of drinks and sandwiches. It’s a real treat.