A major fundraiser for the Byrd Theater Foundation, this two-day party is about celebrating the 20th anniversary of one of the Coen brothers’ most beloved film comedies, “The Big Lebowski.” There’s a Carytown bathrobe bar crawl and afterparty, a bowling party at River City Roll — kinda fancy for the Dude — as well as specially crafted brews from Center of the Universe Brewing including El Duderino, a white Russian milk stout and yes, the Donnie. A ticket to the screening of the film includes one El Duderino. The screening is held Saturday at 8 p.m. $15 online, $20 at door. For prices for the separate events, see byrdtheatre.org.