I don't know if the place even exists anymore, but there used to be a place called the Agoura Valley Inn on the frontage road by the 101 freeway. When Wayne Boatwright and his mrs owned it, cheese burgers all around and a pitcher of beer (or 2 or 3 or...) made a great lunch. The staff from the Easyriders offices used to go there occasionally.
The Rock Store on Mullholland Dr serves great breakfasts and burgers. Ed and Vern owned the place for longer than I can remember.