You had that crazy friend that always talked about weird sites with lots of different services.
From one side it was interesting but from other it was quite disgusting. It was more for people with weird fetishes and ect.
From what your friend told you, there were services of things you would never imagine anyone would like or even think of.
They even had special like buildings where they were meeting. A normal person wouldn't guess it from outside the building but that kind of community, if you could call them that knew well.
One Friday night your friend wanted to take you with her really badly and as much as you refused she didn't leave you a chance but to agree.
She told you to dress nicely and meet up in front of your house. She would pick you up and show you where the place was.
Arriving at the building it looked like a normal club with booths and a bar with bartenders but the difference from a normal club was that there was a floor with rooms.
As much as you learned from your friend you could always go home, or anywhere else if you found yourself someone to, well, let's say have fun with.
The rooms were prepared for all kinds of things, services and desires of clients. You didn't think you'll do anything because you were there only because of your friend's request.