The Marriott has a Starbucks in the lobby that has the usual drinks and pastries (no hot food). Lines are long there most of the time, unsurprisingly, but they work quickly. Right next door is the M Store (hotel gift shop), which has packaged sandwiches, salads, desserts, fruit salads, etc., plus a bunch of different kinds of bottled drinks. We ate several meals from the M Store last year. :)