Smart & Final, about 4 miles Northwest
Thai-Lao Market, same area
Party City (bad directions, at Euclid and I-5), same area
Artesia Orange County Ice, 3 miles north
Party America, 5 miles north
Nippon Foods, 5 miles west
In Garden Grove, southwest of the convention center:
Costco, less than 4 miles away.
Hannam Chain Korean Market, same area
Smart & Final, about 3 miles southwest
On Tustin St. in Orange, east of the convention center; looks like a good concentration of shopping:
Trader Joe's, about 6 miles away in "The Village at Orange"
Cost Plus, also in "The Village at Orange"
Party America, also in "The Village at Orange"
Beverages & More, same area
In Costa Mesa, South:
Mitsuwa Marketplace, 13 miles south
Marukai Corporation Store (aka "Japanese Costco"), 9 miles south
Specialty shopping, elsewhere:
Galco's Soda Pop Stop, 30 miles north, almost to Pasadena. Regional, specialty and rare sodas. "Hot Hot Hot Jamaican Ginger Beer"