Interesting thread here.
At my alma mater, one of the dormitory communities was called "Middle Earth" and each dorm building, along with the central cafeteria building & the student center, was named after something in middle earth. Thus it was common among the freshmen (who were all assigned to dorm living) to hear people asking "where do you live?" and the reply was "Rivendell" or "Quenya" or "Hobbiton".
Middle Earth Housing at UC Irvine
The dorms don't look anything like middle earth, though!
However, there is a perfectly round door, hidden somewhere between two houses in the hills where I used to run with my high school cross country team. If ever a hobbit lived in the suburbs of Los Angeles, then it was there!