Denver Mariot West, eh? That's my side of town, and the wrong side of the tracks. Kidding. This is up by NREL, Colorado Mills shopping mall, etc. It's a good 10-12 miles from Downtown Denver, so I don't know how conveniant eating down there will be.
One notable resturant real close to that hotel there is Tafolinos on 20th and Youngfield, it's literally a couple left turns away. It's a good Mexican restaurant. They have the best green chile in the area. Then there's Woody's Woodfired Pizza up in Golden, good place for pizza and beer. If they're looking fine dining, The Briarwood Inn is definitely worth a stop, Golden Hotel and Table Mountian Inn are also good for good eats as well.
And if they're fans of Danny Glover, moutian driving, and good Mexican food, there's The Wondervu Cafe, though it's been a year or so since I was last up there. They serve up stuffed and smothered burritos that are as big as your head, and margaritas the same size also.
They could eat out every day for a month and not run out of good restaurants in the area.
edit: was going to add that Foss Drug is a good place for lunch if they get the chance to explore Golden, but I think they have since converted the cafe into a yoga studio
I used to go there for breakfast all the time. It's a fun place to stop, anyway.