[PapaBear3625]

A high school graduate, single (widows and divorcees with no children considered), 20 years of age (girls 19 1/2 may apply for future consideration). 5'2" but no more than 5'9", weight 105 to 135 in proportion to height and have at least 20/40 vision without glasses

That age requirement would tend to exclude college educated women, and indicate they were looking for attractive working-class women. The job would result in them meeting lots of men from higher income levels who might be suitable husband candidates and allow them to "marry up".

[Chickensoup]

Well of course they were looking for working class women, it is essentially a maid-waitress job.