Applebee’s is a restaurant chain which is commonly found in suburbs (I drive past one on the way to work) and which is noted for its… margaritas, really, but they’re pretty close to daiquiris. Knowing that much, I suspect it was chosen for the rhyme (hide the keys/Applebee’s/daiquiris). I imagine his wife is hiding the keys so he doesn’t go out and get drunk again.