answer:You can’t get clearer instructions than this: (from your link). It sounds like fun. “Dining is traditionally outdoors, but in practice the party is often driven indoors by bad weather or aggressive mosquitoes. “Customary party accessories are comical paper hats, paper tablecloths, paper lanterns…, and bibs. ” A rowdy atmosphere prevails amid noisy eating and traditional drinking songs (snapsvisa). “The alcohol consumption is often high, especially when compared to the amount of food actually eaten (crayfish shelling is tedious work). “It is culturally correct to suck the juice out of the crayfish before shelling it.”