Hamams of Istanbul
There are 237 hamams in Istanbul, 60 of them are still in use. Below is a list of hamams in Istanbul. You can also find detailed information on the hamams from a blog dedicated to the subject on hamamguide.
Different Hamams of Istanbul for Different Purposes
Price-Quality ratio wise
Gedik Ahmetpaşa Bath near Beyazıt stop on the tram line is a good one, its -a bit- cheaper than other touristic hamams, Çemberlitaş, Galatasaray, Cağaloğlu and usually less crowded. It also has a sauna and pool inside. About Template:TRL including Kese service.
Off the path but still good
Mihrimah Sultan Mosque's hamam Mihrimah Hamam is also another good one. It is around major attractions such as Chora Church and Anemas dungeons and also near the most beautiful mosque in istanbul in my opinion: Mihrimah Sultan mosque. Sadly it gets crowded in Summer weekends but still try your luck. The entrance fee is Template:TRL.
Major touristic, a bit expensive
Çemberlitaş hamam, and Cağaloğluhamam. They are about Template:TRL for the plain service. Plus 20-30 for the massage and kese. Expensive, clean, but very packed sometimes. They are both very central. Cağaloğlu is near Sultanahmet. Çemberlitaş is right at Çemberlitaş tram station. Çemberlitaş hamam has a nice cozy cafe situated on the roof where the hamam domes are, be sure to visit and have some tea!
There is also the Süleymaniye Hamam of the Süleymaniye Mosque. Only tourists are allowed into this one and it is unisex.
Touristic, and with a Disco vibe
Galatasaray turkish bath. The owners installed color changing LED lights, which some people find annoying and takes the peaceful atmosphere away. Still its a pretty nice hamam. About 30-40 to enter.
There is a newly renovated hamam in Sultanahmet called Hürrem Sultan Hamamı. Possibly the most expensive hamam in Istanbul. The entrance is 80 Euros.
24 Hours open and unisex:
Ağa Hamamı near Galatasaray. This is not a bad bath as well. It's a wonderful place to go late-night after a drinking session in Istiklal Street... It's old, its clean and its open 24 hours! and is unisex! I'd say its the kinkiest hamam in istanbul.
Major local, cheap and traditional hamams:
These two are some of the better traditional hamams: Sofular and Haseki Bostan Hamamı. They are both in historical neighbourhoods that are off the beaten path and yet in an absolutely photographic area.
Haseki Bostan Hamamı The walk to and around Haseki Bostan hamamı was great. You would get off at Yusufpaşa Tram stop and walk up from Haseki Street. And on the way back walk back from Cerrahpaşa-Kocamustafa Paşa street. The entrance to Haseki bostan bath was a mere Template:TRL, plus Template:TRL for the kese guy. it was not crowded. But not as elegant as other touristic hamams. The male section closes at 10pm and females closes at 7pm.
Sofular Hamamı Sofular Hamamı is also built by Mimar Sinan in Horhor You can reach it by walking from Aksaray tram station. It is not well taken care of as the major touristic ones but you may like the design of it more and its more peaceful compared to the other ones. The entrance is 25TL. You would pay an additional 10TL to the Kese worker. And the massage is an additional 15TL. For women, the entrance+kese is 50TL. The traditional service inside is called Kese. You can also have massage. Generally, in tradional hamams you would pay the price of the entrance upfront, ie. Template:TRL-Template:TRL. And then after your service is over, at the exit you hand over 10-15 Lira's to the guy who did kese for you. But this is the traditional approach and for many touristic places such as Çemberlitaş, Cağaloğlu and Gedik Paşa you don't have to follow this.
Finally: If you have slippers bring them if not they do provide you a pair. Other than that most hamams are VERY (zero germs.) clean inside due to heat and the nature of the marble. Here is the scientific backing: http://goo.gl/LAaNr