Never been to Turkey before..but I was in Tunisia for Ramadam 2 yearsago and I noticed alot of shops etc close at about 5pm so that the staff can go home to eat!!
But everywhere came really alive at night..Monastir was lit up beautifully at night.
So I'm guessing Turkey will be much the same??
I also noticed that whilst the locals had no problem with Tourists eating and drinking discreetly during fasting hours they had absolutely no respect at all for any muslim who broke the Ramadam without good reason..(pregnancy,illness etc).
Overall we enjoyed the experience of staying in a muslim country during Ramadam.