Probably Artemis is the best club for big breasts. I have been in Frankfurt at the Palace, they also have some enhanced girls, more then in other FKK Clubs in Frankfurt. Service can be very good to horrible bad.
Globe has also some,service is always excellent there because of the standard they have. So you wont get disappointed there, its pricey but worth it. What you can do is go to the website club-globe.ch und you will find the girls who are working with pics. If you scroll down you see other clubs with the pics of the girls. If you search something in Switzerland, the best website is and6.ch. They have a search function for bust size.