The Room Service at The Westin Los Angeles Airport
The room service at The Westin Los Angeles Airport is referenced by expert reviewers. Of the 4 publications that we monitored, 2 recommended the room service, including Star Service and Gayot.
The Westin Los Angeles Airport 
Star Service
Gayot
Star Service "Room service runs 24 hours a day, but cold dishes are offered after 10 pm"
Gayot "There is a small workout room and pool on-site, as well as the Daily Grill Restaurant & Bar, serving classic American fare for breakfast, lunch and dinner in the dining room, with room service round-the-clock"
