The stunning dress in the center probably prompted the photo. All three hats are big and the center and left people wear high collars.
Keywords (left person to right person): 1911, flowered brim hat, trimmed jacket, lapels, wrap, close skirt
feathered hat, blouse, high enclosing neckline, under-dress, scoop neckline, elbow length close sleves, lace contrasting cuffs, tight under-skirt, lace blouson over-dress, strap sleeves, buttons, waist band, tight over-dress, gloves, parasol
brim hat, veil, high enclosing neckline, jacket, jacket ornament, long close sleeves, turned back contrasting cuffs, close skirt, purse