Cruise passengers embarking or disembarking in Los Angeles (or the terminals at San Pedro) can do all of the above and more in one day, minus losing your keys, of course.
The Avid Cruiser’s recommendations for a full day in Los Angeles: Rent a fun car at Beverly Hills Rent-A-Car; drive to Venice Beach and Santa Monica, before heading to Hollywood and Universal Studios Hollywood.
Plan to spend at least a few hours at Universal Studios Hollywood, making sure to do the Studio Tour.
On your way back to return the rental car, stop at In-N-Out Burger. You’ll see plenty, but if you should miss, there’s one across the street from Beverly Hills Rent-A-Car. Order menu item #1. Substitute the soda for a shake if you wish.