Does a Zeyrek bath booking include its museum?
Do not assume it does. Check the operator's current ticket and treatment terms; museum access and bathing can be separate arrangements.

Related questions
What do old tile fragments tell us about a hamam?
They can help explain its decoration and construction history. A surviving fragment is evidence; a complete modern display may also contain reconstruction.
Are there Byzantine remains beneath Istanbul hamams?
At Zeyrek Çinili Hamam, Byzantine cisterns survive beneath the Ottoman bath. That is this building's story; it does not describe every hamam in Istanbul.
Is Zeyrek worth visiting for hamam architecture?
Zeyrek Çinili Hamam offers a specific architectural and museum context. Check its current visitor arrangements; it is a separate venue from Golden Royal.