Actually....the last time I was in Wal-Mart, they had no 27" tyres at all! They had lots of 26", some 24" and smaller, and a couple 700c hybrid-type tyres. No 27".

As far as the humble end of the cycling populace goes, around here, not only do you have the "DUIBirds", but there is also another subclass-the "Aunt Sally Specials" These are the old 27" 'touring' bikes of the 70's, often with the bars flipped, and almost always a women's or mixte frame, piloted by a man. Often seen with large plastic bags tied on either side, filled with empty returnable cans and botles. Often seen congregating at supermarkets where bottle redemption centers are located. (This is probably why many supermarkets here don't allow ANY bikes to be parked out front...)