Parkbad Fitness Centre is located at Linz, Austria and, just like so many fitness centres, it has it's own saunas and steam rooms attached to it.
Sauna's on Amazon Here
It's sauna centres have both sexes mixed up and nudity is compulsory, however reports of customers constantly engaging in unauthourised sexual acts have propted the management to do something drastic.
Management hired undercover security guards who also go naked and pose as fellow customers among the naked crowd.
And so far they have caught some couples in the act. They have been banned from returning.
Ask me again.
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