Is there any place to eat with in walking distance from the doorways hospitality house?

Plenty of places within walking distances. Secret Sandwich Society, Subway, Restaurant at Marriott, Poute De Soup, Tenka Ramen, Soul Taco, Salt and Forge are all under .5 mile from here. I was a liver transplant patient with neuropathy and I could make it. But of course it depends on how bad your health is. All of these are unfortunately closer than any convenience store. They also provide a list of all these when you arrive.

Not that I can think of, but there is a convenience store a few blocks away from town.