Use the gloryhole.
From Create Your Own Story
You gulp hard, then turn toward the booth. It's now or never. You breathe deeply and place a hand on your cock, carefully aiming toward the hole in preparation.
Then Lily, in all of her sexual wisdom, slaps your ass hard. The pants around your legs have you off balance, and you stumble forward, your cock shooting into the hole and your body pressed flat against the cold green enamel of the booth. You're in it now.
Immediately from beyond the wall a warm and pleasant sensation starts enveloping your cock.
You feel the orgasm building inside of you, then shooting out. Your eyes are squeezed shut, and little stars of light start flashing in your vision. You are overwhelmed with the pleasure of feeling yourself erupt into the unknown.
After a few moment of standing calming, you withdraw and step back.
Lily is still on her knees beside you, and gently turns your body towards her. She grabs your softening cock and gently licks the last remnants of cum from your tip, then stands before you and starts pulling your pants back up to your waist. In your post-orgasmic blissful state, you try to help her with the clasps and buckle, but Lily laughs and brushes your clumsy hands aside.
"Come on," she says, slapping the cheek of your face playfully. The sensation brings you back closer to full awareness. "There's a lot more to do and see."