I have 2 clients in El Segundo. In fact one is right on Century Blvd. There is nothing there.
Uber to Manhattan Beach is a great suggestion. There are 2 really outstanding restaurants there.
The Strand House -
http://www.thestrandhousemb.com/. Up scale, great food, good wine list. Pricing is reasonable- 2 people with wine is probably going to be around $250. The rack of lamb is great, as is the branzino. Make a reservation and ask to be put by the windows. Stunning views of Palos Verdes to the south and Malibu to the north. Very pretty to watch a sunset while dining.
The other restaurant I would recommend is Manhattan Beach Post -
http://www.eatmbpost.com/ . Its a little more casual but its very much California "farm to table" food. It's very unique to CA. Small portions that you can share. Extremely fresh veggies and fish and very lean meat. Extremely light on the oil but incredible seasonings. The menu changes based on the season but try the Challerhocker, Roasted Brussels Sprouts, Pomegranate Couscous, Spiced Green beans. The Skirt Steak is really good as is the Pan Roasted Cod. The best thing though is the Bacon Cheddar Buttermilk Biscuits. They are a little out of character with the rest of the food but they are amazing. I think its my favourite restaurant in LA. The wine list is good but they also do Atticus if you are in the mood for a really hoppy IPA.
The other very interesting place is The Warehouse -
http://www.mdrwarehouse.com/. It's in Marina Del Rey. Its about the same distance as Manhattan beach but driving north. Its been around since the 60's and was founded by a really famous camera man and photographer called Burt Hixson. In the 70's it was a hang out place for all the stars as they had their boats in the marina so the walls are lined with photos from John Wayne, Ricardo Montalban, Robert De Niro, right up to modern celebs like Adam Sandler and Steve Buscemi. I'll be honest, I prefer the food at the Beach Post, but for the atmosphere its hard to beat. You can sit out on the deck that is right into the Marina. They are consistently voted one of the 10 best steak houses in LA. Generally its full of people from the Fox lot as its just up the road so its possible to catch someone from a series like Bones or CSI.