Friday's Faces from the Past~What is She Wearing?

A polaroid picture of my maternal grandmother, Mary (Baker) Hudson (1920-2010) shows her standing by an advertisement for Allied Investment County of Columbia, South Carolina.
From the background, it looks as if it could have been at some type of exhibit hall.
I am not sure if she is wearing a typical suit from the time period or some type of uniform. 
She was a homemaker and did not work outside the home.
What do y'all think? It was most likely taken in the 1950s.

Mary (Baker) Hudson
1950s
Columbia, South Carolina
©Cheri Hudson Passey

Does this type of outfit look familiar to you? Can you tell me what my grandmother is wearing or why this picture may have been taken?
Thanks so much for stopping by!

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