Most places that have steak on the menu will produce a reasonable effort. Lots of folks on here will recommend their favourite but I'd suggest that you try them all and settle for the one YOU prefer. It's not always about the quality of the steak. There's also the atmosphere, company, staff quality and whether or not you think you fit-in.
Personally I'd rather cook my own steaks and prefer to eat out at soup kitchens, lokantas and kokorec stalls.
Afiyet olsun