Re. time....

The average U.S. household has a TV on for 8 hours per day, with each person consuming ca. 3 hours.

Re. suits...

Good question. Could it be that they knew a photographer was showing up and since that was such a big deal in those days they wore their Sunday best?

I have seen a family picture of my grandfather fishing in his Sunday suit with an apron on. That was the norm back in the early part of the 1900's.

This reminds me of an incident happend in Romania this summer: there were some catastrophic floods in one remote area and the President decided to go see the disaster scene.
Of course media was all over the place, direct TV coverage and whatnot. As he descended from the helicopter wearing action outfit (e.g. rain jacket and rubber boots, the local mayor came and greeted him. The only thing was, well, the mayor was wearing suit...
The President verbally slammed the poor guy, in front of all those TV cameras and sent him back home to change to a more appropriate outfit (at least in his vision).
The trick here is that for that mayor, in that godforsaken village, the arrival of the President was once-in-a-life-time event and he decided to honor it by wearing his best suit.
Obviously, this was not fully appreciated by the "guest"...