Howard Johnson has a pretty big store (like 7-11 type) in their lobby called Main Street Market. I was staying at a different hotel in May and needed something and went in and grabbed it there. This is what it says at the HoJo website:
Open Daily from 7AM to 11PM
Breakfast items such as: milk, juice, cereals, oatmeal, fresh fruit, pastries, & meal bars
Lunch items such as: bread, cheese, lunchmeat, peanut butter & jelly
Snacks galore, like: crackers, candies, popcorn, gum, mints, nuts, trail mix & much more
Ice cream
Beer & wine, sodas, bottled water, bottled coffee drinks, energy drinks
Disney gifts & souvenirs including shirts, hats, sweatshirts and collectibles
Anaheim and California gifts & souvenirs
Phone cards
Postcards and postage
Laundry detergent and dryer sheets
Sunglasses, suntan lotions, hats and raingear
Pool toys and floats
Stationary items, pens and pencils
Sundries including face/hair/dental/body products, sewing kits & much more
Over-the-counter pharmaceutical products
Magazines, puzzle books & free USA Today daily newspaper