Back row:  Omer Nugent  and wife  Emma Belle Williams Nugent.
Left to right:  Eunice,  Addie Nugent holding Joseph Omer Hauk  (Addie was divorced within a year of her marriage to George Hauk),  Mable and Mamie Nugent.

I can only make a guess at the two men on the front row.  Eunice married Lawrence Schmit in 1914, so that could be him.  Mamie married Elmer Snyder in 1916 that could be the man beside her.

If I could guess at the age of Joseph sitting in Addie's lap we could estimate the year of the photo.  Joseph was born in 1908.  I estimate him to be between 4 and 6.  So the photo could have been taken anywhere between 1912 and 1914.
Information on the back of the photo says L. S. Ayers and Co. Indianapolis Ind. Mable worked for L.S. Ayers in the Tea Room and retired from there. - LNF