LORELAI: Talk to some kids, I’ll hang out with their moms, and we’ll get into Harvard, take over the world, then buy Chilton and turn it into a rave club.
A rave club is one which hosts dance parties (“raves”), typically featuring Djs and electronic dance music. Most often associated with the early 90s.
Note that Lorelai says, “We’ll get into Harvard”, rather than “You’ll get into Harvard”, as if Rory has to succeed for both of them.
The Annotated Gilmore Girls 