RORY: Oh! You should walk down the aisle to Frank Sinatra with a huge bouquet of something that smells really good.
LORELAI: Pot roast.
RORY: And you should wear a long veil with your hair up.
LORELAI: Ugh, I’ll take any other subject in the world for 200, Alex.
Lorelai is referring to the game show Jeopardy!, previously discussed. The host is Alex Trebek, and Lorelai mimics the game play of the show, with contestants choosing a particular subject for a certain amount of money (such as $200).
Lauren Graham, who played Lorelai Gilmore, went on Jeopardy! as a contestant in a celebrity episode of the show.
The Annotated Gilmore Girls 