Agree with Servorg (or should I say follow 99.999% of the time). Are you looking for any types of food or cuisines in particular? How far in miles or time are you willing to drive? Having your own wheels really helps unless the Marriott shuttle can take you to where you want to go. And of course, what are your $$ perimeters?
If you're looking for a place with good menu choices, good food that most would be happy with, good wine and a comfortable place to enjoy with your friends, I'm thinking of two places in El Segundo (the town immediately south of LAX). Second City Bistro and Paul Martin's American Bistro. Second City is in downtown El Segundo (think Mayberry) and has fewer menu choices, is much smaller, but I personally think the dishes they serve are better executed and the smaller wine list has a better percentage of winners that I've tried. But Paul Martin's off Rosecrans has a broader wine list, more menu choices and the dining room is bigger and more open (but it can get a bit loud in there - a younger crowd). You will probably average about $40-50 per adult for food and wine/beer at either place, but Paul Martin's can add up quick if you throw in any fresh seafood apps/fruits de mer.
Second City Bistro
223 Richmond St, El Segundo, CA 90245
Paul Martin's American Bistro
2361 Rosecrans Avenue, Suite 180, El Segundo, CA 90245
This is going to be an anti-recommendation: I was at a conference recently at the LAX Marriott and several of us dined at the Proud Bird. The view of the LAX runways are amazing. The food is horrible. There was not one single redeeming feature of this restaurant.
11022 Aviation Blvd, Los Angeles, CA 90045
Since you give no parameters to your request other than "good food" it's hard to try and tailor a reply with any specific places in mind. How far are you willing to drive? Are you looking for something more upscale and with a nicer ambiance? Or does something from the ethnic dive but with great food ring your chimes? Any budget constraints? Any type of food that you love? Any type of food that you hate? With all that said see this recent thread for a "shotgun" approach to finding someplace you and your friends may like: http://chowhound.chow.com/topics/6831...