Consider handing them a piece of paper with your number before you get off the train. Consider volunteering for a cause you care about, and see who you meet.
At the very least, you'll make friends (with more potentially cute buddies).
Yes, randoms who think it’s OK to talk to you when you’re clearly deep into tweeting something about your coffee can be really annoying, but sometimes when you give strangers the opportunity to talk to you, they can actually be cool.
(But you’ve seen hundreds of rom-coms, so you know that.)Of course, you need to be safe and should never feel harassed— but sometimes, rape culture has made us believe we're always in danger, when in reality, we might actually sometimes enjoy the thrill of talking to a stranger.
When you’re with your friends it can be intimidating for someone to come up to you, but when you roll solo it’s easier for someone who might want to get to know you to make their move. If you're shy about going out alone, bring a book or a journal at first, and take small steps to get comfortable with the feeling.