You bring an item, ideally a homemade food of some sort (granola, jam, kimchi, pasta sauce, baked goods, fried pickles, whatever!) or a kitchen appliance (those placemats your boyfriend’s mom gave you that you hate) and place it on a table with a bidding card.
As you may know, drinking is a big part of any adult function, particularly so at Russian weddings. There will be a bottle of vodka on your table at all times. People will be making toasts; you will have to drink with every toast; there will be a lot of toasts.