Characters
I'm driving, you're navigating. Where is this party?
— Spicoli ‧ Fast Times at Ridgemont High

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker divides the responsibilities of a journey: they will drive while the other person gives directions. Asking where the party is brings that arrangement straight into practice. The exchange makes reaching the destination a shared task, with steering and knowing the route assigned to different people.
Context reviewed