If you do decide to stay at the Marriott or the Ren LAX, please note there is a free shuttle called the "Ocean Express" that will take you to downtown Manhattan Beach, which has lots of shops, restaurants, bars, and a pier w/ a small aquarium at the end and is a quaint seaside town & is about 10-15 minutes away. The concierge at both hotels will have the shuttle schedule. It runs from mid-morning 'til mid-evening I believe.

Cheers.