Athletes lovin' McDonald's: Olympic Village
Well, the inside story was from a friend who is volunteering there at Olympic Athletes' Village, is that there were initially enough Olympic athletes who enjoyed the free McDonald's food enough, that one day it shut down one section of other non-McDonald's food offerings.
Other types of (healthier) food for them there, is free.
There are food weigh scales right there in the common eating areas for the athletes to weight their food and calculate, etc.
Of course, within their suites there are some basic cooking facilities.