Oh! of course there is, Istanbul is a big and interesting city and with regards to entertainment is very even, I will list a few of the places where you can have fun and relax excluding sightseeing programs, as you asked:

Aqua Parks Aqua Marina and Aqua Dolphin, Istanbul Dolphinarium, Zoo Baromoglu, Icyik Ice Ice Museum, Istanbul Aquarium, Juraysic Land entertainment amusement park.

You can also entertain yourself with the famous fishing on the Galata Bridge, walking along the streets of Nevizada and Istiklal where you can see many interesting things and make you odnye purchase.

And the evening be sure to visit a variety of nargile cafes and night clubs, of which I can advise Babylon, and Goedet Reyina. By the way, in Istanbul there is an interesting and not rare phenomenon - jazz cafes and jazz clubs, their visit will impress you! The jazz is very pleasant, but in some kind of its own, Istanbul style, what-if ...

And then, I tell you, be sure to visit the Istanbul baths - a hamam, an unforgettable impression, a real "buzz")))) for body and soul, I advise Galatasaray and Chaaluoo.

In general, there is something to be entertained in Istanbul ... here I wrote to you and I already so wanted to go ... mmmmm! :)))