I dunno if it's a custom or not, but back in Ohio, the pre-churched Amish boys were hellions. Saturday nights they would come to town, get drunk, get in fights, and in general cry havoc. One bar had a specially reinforced section of ceiling into which the bartender could fire a .44 to quiet things down. When the bars closed the boys would either stagger outside or be dragged and men would come with a farm wagon and load 'em up. When the wagon passed the home farm gate they would either fall off or be carried off the wagon and laid in the grass (or snow). Sunday evening they'd go into town and collecter their wagons and horses from the stable where they'd left them.

Church services, especially if they were at the home farm of one of the carousers, could be interesting (or so I was told).