This happened to me all the time when I lived in Savannah… in the first week I was there, I knew absolutely no-one. Not even my parents came with me to move in.  So I introduced myself to pretty much every single person I met… but of course, only stayed friends with a few of them.  But somehow, tons of random people from that first week would remember me and wave at me from across the street shouting my name, and I’d be like “Heeeey!….ohmygodwhowasthat” :D;;;