They are almost interchangeable, but you could convey a subtle difference in meaning. If you're trying to describe your job / what you do, you'd want to say you work "at" a grocery store. Working "in" a grocery store describes the location you work at. For example, I work in an office, but I work at a company.
I work "in a grocery store" or "at a grocery store" [duplicate]
Double bagging at a grocery store is what it means, two bags to hold the weight of groceries put in them without tearing. The sexual double entendre is also a natural extension of meaning in a wide variety of contexts humans can (force) conjure.
Groceries is the term you are looking for. Here in the US, the phrase grocery shopping covers every imaginable household consumable. I can go grocery shopping and end up in Walmart, stop at Starbucks or even at a gas station. Oftentimes, grocery shopping is just an excuse to go for a relaxing drive and get some coffee while you're at it! As for venue, the term grocery store is used for ...
What kind of store do you mean? Dept store? Grocery store? The answer may vary. Also, many larger stores have cashiers, stockers, and salespersons.
The produce aisle is usually rather different from other aisles in a supermarket or grocery store. It is usually wide and runs along the wall: the right-hand wall in right-hand–drive countries and the left-hand wall in clockwise or left-hand–drive ones.
A store selling foodstuffs and various household supplies. Also called grocery store. groceries Commodities sold by a grocer. Online Oxford Dictionary (groceries) Items of food sold in a grocery or supermarket. So, 3 out of 4 suggest the term can be used for non-food items bought at a grocery store and only one limits the word to foodstuff alone.