108 MeFites claim to live exactly here: +47° 25' 56.10", -121° 48' 12.20". Which is, in fact, nowhere. [more inside]
Apparently over 100 MeFites live in a rowhouse in the McKinley Park neighbourhood of Chicago. Here's a few of them; you can find many, many more by looking at the "Users nearest this user" display. Perhaps we should hold our next meetup there?