Combine online dating and a love for mass transit and what do you get?

As a single person wandering through the world, it can be difficult to find someone who loves all the right things: parks, subways, bike lanes, human-scale buildings, high-density housing, debates over the ideal length of a city block. Even on a dating app, you can’t always tell from a profile who might be thinking, behind their smile, I hate cars.

But if this is exactly the sort of partner—or friend or fling—you’re looking for, there is a solution: Join the wildly popular Facebook meme group and leftist community NUMTOTs (“New Urbanist Memes for Transit-Oriented Teens,” which isn’t really just for teens) and request access to its private spin-off group, NUMTinder. With about 8,000 members living mostly in North America, the United Kingdom, and Australia, NUMTinder is a makeshift dating environment for those who consider liking public transportation to be a core part of their personality, or those for whom a lack of interest in urban planning is a deal breaker. Almost everyone in the group posts at least one selfie with a bike or a subway entrance, to demonstrate their commitment to the lifestyle, and when a new member introduces herself, it’s not uncommon for her to brag about the fact that she doesn’t have a driver’s license. (A second spin-off group, called NUMThots, is for sharing the spiciest seminudes that Facebook’s content moderation will allow. But transit-themed!)

The primary advantage to online dating is that it expands a person’s options beyond geography and their immediate social network to a much broader pool of people who can be filtered by particular traits. In this case, limit the pool to people who care about mass transit and those with that interest can search for partners.

While this may seem strange to the general public, is it really any different than numerous other likes people care about? Just as a comparison, plenty of people like cars or specific cars. At races, car events, clubs, and more, people with these interests could come together. Or, take people who regularly watch trains. Through different communities, these people could meet up and interact. The primary difference is that more Americans might like cars than mass transit.

A final thought: I imagine this group might be more useful in and around cities with a lot of mass transit. Of course, it could also be helpful in other places where few people even think about mass transit because it is not as present.