Walking around in the early evening and stopping wherever people are gathering.

I was just popping out for salad greens, and ran across a group of young people having a picnic on the sidewalk. They had way too much food and were offering to share it with everyone who passed by. I wasn't hungry but I sat down and joined the picnic anyway. Great people! I stayed for over half an hour and I'm so glad I did.

And this isn't a one-off. This is how I met my wife, too, sixteen years ago. You gotta be open to spontaneous experiences.