The NY Times reports that many Americans nap. I’m one of them. I always felt a little guilty about admitting to the habit until I went to Vietnam, where nearly everybody naps after lunch. Some of my Vietnamese friends even have little fold-up lawn-furniture-type beds beside their desks. (Americans, with the exception of college students, seem to have an aversion to sleeping in public, perhaps because we have sufficient physical space to be alone.) Americans don’t have the excuse of working in a hot country with limited air conditioning, but in any case napping seems a natural human impulse.
Note: Apparently, our primate brethern take naps and do so with their pals.