I think with the references to "promoters" a few times it's clear you're talking about a different metric than I am. Clubs in Tirana and Zagreb feel gltizier, more what one would expect from Balkan clubbing (which obviously exists in Belgrade too). Belgrade has some grittier clubs where both the decor and crowd feel like they're taking style cues from Berlin.
Belgrade is long way from Europe although the scene is good, but I’d say Croatia and Albania are much more preferred by promoters