Ahoy there lads!
Today Uncle Weskers gonna be teaching you how to get laid in fallout 4.

Just goto Goodneighbor and enter subway tunnel called *The Third Rail*
Inside you'll get a free access cause you're awesome.

Then you'll hear a song,or nothing at all depends on the hour.
What you need to do is to find the red dressed chick.

And just talk to her,flirt 4 times.
Done.
Edit:You can also fqk her as a chick.