My son's suburban school and mine both run breakfast clubs for year 6 during SATs week.

At his school, we will get the menu, choose his cooked breakfast, choice of cereals and juices, number of slices of toast-and send in a cheque.  The school cooks are paid for the extra shifts.

At my school, the breakfast club is funded by the staff. We feed them toast and jam and juice, paid for out of the head teacher's own pocket.  The rest of us come in early and unpaid, bearing our own domestic toasters and reliant on the goodwill of friends looking after our own children before school. Some of us even make muffins.  

To be taken up by those who really need it, a breakfast club would have to be free.  We know we need one-a lot of our children don't eat breakfast.  But it takes quite a few of us to make and waitress all-you-can-eat toast and jam to just sixty kids in the time available.  And the paid-for-by-the-staff model isn't exactly sustainable over the long term.  :(