Honestly, none of them provide something that would actually be a good replacement for dinner. Occasionally, I'll be in a mainline Marriott or Hilton that happens to have a really great C-lounge where they stock enough hot food (and stock it late enough into the evening) where you could have something approaching a dinner.

But then I'll stay at other Marriotts/Hiltons that stock cheese & crackers and 5:30PM and when the stuff runs out an hour later, that's it... It depends on the property.

But really: if he's not on his own dime - just trying to stick within a somewhat tight per diem, for example - maybe he should check out something like Chowhound to find good dinner recommendations that won't break the bank?