Yes, it's a subway. When Sophia goes to get a haircut, she can take the car or the subway. Taking the subway is pretty dumb and pointless though, as Patricia tells her it's dangerous, and not to do it, especially at night.
And the thugs don't get up to much, and nothing worthwhile. Isn't even any nudity. And from memory, even if you don't report them, aren't due to return until much later, if at all.
EDIT:
I was curious, so I went and checked, and you don't even get any Filthy points from the encounter. Much like choosing Dylan over Ellie during the soccer game, watching porn etc. No real point since they achieve nothing in the story at all.
