(1) Runyon Canyon (3 difficulties), (2) Los Liones Canyon, and (3) Zuma Canyon Trailhead.
Venice - walk around the Venice canals, shop along Abbot Kinney, eat at Gjusta or Gjelina. Santa Monica - pick up sandwiches from Bay Cities, bike ride on the boardwalk, and hang out at the beach.
Pickup smoothies/acai bowls from Sunlife Organics, hike at Zuma Canyon Trailhead (3 miles roundtrip), pick up burritos at Lily's, hangout at Zuma beach, and eat dinner at (i) Broad Street Oyster, (ii) Malibu Farm, or (iii) Old Place.