Who are Larry, Darryl, and Darryl?

Well, since no one’s bothered to ask, it went something like this…

LARRY: Darryl was wondering if you’d watch our cafe while we take our vacation on the Riviera.
DICK: You, uh, you guys are going to the south of France?
LARRY: No, we just go out in the woods and lay on the hood of an old Buick.

Ah. And I was wondering what the joke was about them laying on a car in the woods.