Wrong. Grocery stores can sell beer as long as they meet the requirements, as per Pennsylvania law, and limit how much customers can purchase.
When a grocery store in Pennsylvania wants to sell beer, they need to apply for the same sort of license a restaurant would—aptly titled “Restaurant Liquor,” or an “R” license. The idea behind an “R” license is that the establishment’s main purpose is to sell food to the public. The interior dimensions of an “R” license establishment must be at least 400 square feet and be equipped with at least 30 chairs, at tables.