I have a few. One of them is Prague. I love that city, love the clubs, K5 Etc. The prices in clubs during happy hour are so cheap. 1500 czk for example 45 minutes in AAA Exclusive club. Its amazing price. Beautiful people, all around good atmosphere.
Second one probably is Barcelona and Madrid.
I mean if you even look at the looks of the independent girls there (for example
AdultBarcelona.com these are amazing. Also the worlds best escort agencys are in Spain, - apricots, per la negra etc.
Again there are a lot to choose from, and if you enjoy inviting them to your hotel, the opions are huge.
Third maybe Germany and the FKK clubs.