It all depends on what country you are talking about. Turkey? Elsewhere in the Middle East?
I am a huge fan of bath houses wherever I can find them (my affinity was originally developed when I lived in Russia, where they are very popular). I have done the bath house experience in Russia, Kazakhstan, Korea, Morocco, Turkey, and Hungary, among other places (even the Russian baths in Manhattan!). They all have their own character. I prefer single-sex bath houses--frankly, it's bad enough looking at lumpy/saggy old women naked without having to add in lumpy/saggy old men wearing Speedos!
In Turkey, you can expect a lot of walking around naked, massages if you want them, washing yourself using a copper bowl of water, etc.