So I missed my flight and I now have a 23 hour layover at Istanbul Ataturk airport. Is there any lounge I can pay for access to - preferably airside?
The primeclass CIP Lounge allows paid access for what appears to be 30 Euro. Access is also available via PriorityPass. It's a long time since I've been in that specific lounge, but I seem to remember that it was one of the nicer airport lounges I've visited.
There is also a hotel which offers both airside and landside rooms. If you have the ability to go landside you'll find that the rooms are significantly cheaper!
There is also a HSBC lounge which you can access for free if you have a HSBC credit card of any type.