What great deviation in etiquette occurred at the veselija in Chapter 1?

It was traditionally expected that every attending the veselija would financially contribute their share to the celebration in order to offset the cost for the bride and groom. Many of the guests at Ona and Jurgis' celebration ignored this tradition, leaving the couple with an enormous bill.

A trouble was come upon them. The veselija is a compact, a compact not expressed, but therefore only the more binding upon all. Every one's share was different—and yet every one knew perfectly well what his share was, and strove to give a little more. Now, however, since they had come to the new country, all this was changing; it seemed as if there must be some subtle poison in the air that one breathed here—it was affecting all the young men at once. They would come in crowds and fill themselves with a fine dinner, and then sneak off. One would throw another's hat out of the window, and both would go out to get it, and neither could be seen again. Or now and then half a dozen of them would get together and march out openly, staring at you, and making fun of you to your face. Still others, worse yet, would crowd about the bar, and at the expense of the host drink themselves sodden, paying not the least attention to any one, and leaving it to be thought that either they had danced with the bride already, or meant to later on.