I've already written a drabbleish bit about this where one of mine and Emma's OC's - Oropher's great-uncle Baralin - and his youngest son, Luthavar, who's closer to Oropher's age but is very mischievous, bring a shipment of Dorwinion to Imladris, and Luthavar gets the Imladrin elves drunk on it, causing this nonsense, much to his father's displeasure. *snicker*
RE: Elves of Rivendell, singing, drinking