I decided to look over my statements online after reading this and found out.

Traditional-Style Grocery Stores Always Coded as "Groceries" (stores were in Maryland, Nevada, Pennsylvania, Virginia and the District of Columbia):

• Albertsons
• Giant Food
• Grand Mart
• Harris Teeter
• Redners
• Safeway
• Shoppers
• Trader Joe's
• Wegmans
• Whole Foods

Liquor Stores Not Run By The Government Usually Coded as "Groceries":

• District of Columbia:
  • Liquor stores - Yes, all three
• Maryland:
  • Liquor stores - Yes, two of three (one coded as "Merchandise & Supplies - General Retail")
• Pennsylvania:
  • Pennsylvania Wine & Spirits (state liquor and wine store) - No
• Virginia:
  • Total Wine & More - Yes
  • Wine/beer stores in Virginia - Yes, all three
  • Virginia ABC (state liquor store) - No

Wineries Coded as "Groceries":

• Every winery I visited in California (Santa Ynez Valley), Virginia and Pennsylvania coded as "Groceries"

Convenience Stores Usually Code As "Groceries" (some with gas pumps coded as "Fuel", another bonus category):

• 7-ELEVEN - Yes
• Marvelous Market (neighborhood gourmet store chain in Washington, DC) - Yes
• Sheetz - Fuel
• Wawa - Fuel

General Merchandisers That Sell Groceries Rarely Code As "Groceries":

• Costco - No
• Target - No
• WalMart - No
• World Market - Yes

I also noticed that a couple places that sell prepared food and gourmet groceries were coded as "Restaurant - Bar & Cafe".