CTL:
No clue where you hang out or go to weddings. I have been at virtually hundreds of chassidishe weddings, and quite a number of rebbishe ones, too. I do not always come for the seuda, and often come later to give my mazel tov wishes. But there is always a decent meal on the table. Perhaps the huge ones serve on plastic/disposable plates, but these are not ones on sale at the bargain store. The seuda is respectable, though perhaps not the fancy dinner you might get at a high priced restaurant. Food volume tends to be quite decent, and there is generally a flow of people (waiters, etc.) to replenish the drinks and supply cups.
As for the photos, they may represent the hours after the tables have been cleared to facilitate dancing and the mitzvah tantz. All that are usually left seated are the dignitaries and mechutanim. And your observation that there is no food is accurate, as they have concluded the seuda and benching/sheva brochos prior to that. A picture says a thousand words, but not words might be factual. Check the context.