Local Steemit meetup sounds good.
I have passed, usually without comment, several people on the street or in shops, like the Oxxo you mentioned, who have been there the whole time I've lived here. I rarely talk to them, but it's fun when I do. Every encounter with them after that, especially in a place where they don't work, is special.
And I think it's only fair to give your own name when you address someone by name whom you don't know. After all, they're wearing a name-tag for all to see, but you aren't.