I think we should actually make a fun game out of this absurd thread and figure out about when the picture was taken. I'm not knowledgeable about Italian street bikes like those pictured, but the clothes look like the 1980s to me, especially the cut of the suit and the style of the windbreaker. Also, the lights appear to be battery-powered incandescents, which I think would fit the era's technology.

Is the IG shifting a clue? In the U.S., any later than about 1983 or so, and I think the odds of 3 IG bikes meeting by chance would be almost nil, I don't know if they stayed common in Italy.

Also, the rear rack looks like 1980s or later to me--any earlier and I wouldn't expect to see black ones. Am I wrong about this?