Starting a Late-Night Walking Group

My partner and I love going on long walks in the dead of night, around 11pm-2am. It's quiet, there're no cars on the road, and alot of the flowers are especially fragrant at night. We feel safe going for these walks because we're together; neither of us would feel safe if we were walking alone.

So it occurred to us that maybe there could be other people in our neighborhood who might be interested in taking late-night walks as well, but don't because they don't have someone to walk with. We're thinking about starting a group.

Have you ever started a neighborhood walking/running group? How did you go about it?