Alright...
In Istanbul, the best places that plays metal is Karavan(pub at Taksim)
Kemanci Rock Bar (Besiktas)
Orta Kahve(Cafe(they have realy good nargile!!!(a special turkish tobaco pipe)))
there are many others but i go only to these when go ist.
In ankara Keyif and Gölge(pubs at Sakarya play mostly trash and late at night it turns to black and death. And you can find me there
)
Limon (at sakaya too and plays punk and hardcore)
SaklýKent Concert Hall(everynight live performances)
Onaon cafe(has a music box with a large playlist of all kinds of rock and mostly we metalheads gather there.)
Orta Dunya cafe(plays power and heavy)