This image advertised one of the Golden Potlatch festivals held from 1911 to 1913. Otto added the caption at the top; the faces on the billboard were apparently already there.
Stores visible from left to right are: C. N. Lohndorff Tobacco, Rainier Restaurant & Bakery, and the Seattle Crisp Co.
Note the spelling of "Seattle." Otto was writing captions backwards on the glass negatives, and sometimes missed letters or strokes within letters.