From (Season 10 Episode 10) “Viva Ned Flanders”

When Springfield’s only casino is demolished because of curfew, massive dust clouds form, prompting the Simpson family and Ned Flanders to go to a car wash to get rid of the dust on their cars. There, Homer sees Ned gets a senior discount. Thinking that Flanders is not a senior and lying about his age, Homer reveals this at church. As a result, Ned is forced to admit to everyone that he is sixty years old and only looks young because he has never done anything exciting in his life. Out of pity, Homer decides to take him to Las Vegas, where, after a night of partying and gambling, they end up marrying two casino barmaids while drunk. As Homer and Ned try to escape from the barmaids the next day, they go on a wild rampage through the casino, until they are confronted by casino security and banned from ever visiting Las Vegas again.