The Hall of Tongues.

You follow the moaning down the corridor and find yourself in a room filled with booths pressed against the walls. Everywhere you look is another colored booth with plaques on the doors. Next to the entrance you notice an inscription in the wall.

"Welcome to the Hall of Tongues! Each booth contains one of our guests simply shaking with excitement at the idea of sucking your cock. Merely enter the booth and stick it in the hole! No peeking though! That is, unless they want you to..."

Your cock throbs in arousal at the idea. Yes, perhaps you shall partake. But which one to choose?

One is painted purple and shows signs of age. It looks practically abandoned! However, it feels... active somehow. Its door reads "Writhing with Pleasure."

One is the color of the night sky with full moons dotted all over it. You can hear heavy panting and whining inside. Its door reads "Every Dog Has Its Day!"

One seems strangely pristine, painted a shock white with red medical symbols on the side. Its door reads "Medical Sample."

One is a plain black with its door left open. A sign on the inside of the door says "Waiting room." You can see a second hole at eye level above the first. Guess this one likes to be seen.

Finally, you spot two side walls of a booth with no door, almost like a urinal. Inside you see a hole with a woman's mouth pressed through. Her tongue hangs out as she moans sensually. The wall around it has multiple phrases begging for cock, as if she wrote them herself. There is no other signage for this one.