I'll second Marina del Rey and Cafe del Rey. With a bit of extra time, continue a bit north to Venice and Venice Beach.
But as one poster put it, 4 hours is a bit awkward. Figure one hour to clear customs and immigration and one hour to get through security and make yourself available at the gate, 20 minutes each direction to MDR or MB, and you don't really have much time once there.
On the other hand you could just repair down to the Wild Goose
(Do a search!)