Sure, the grocery store is your go-to for groceries, but many grocery stores offer services that you might not expect.Here are some of the most useful auxiliary services your local grocery store can provide:.If your grocer has a pharmacy, you can usually get your flu shot free of charge.If there's a quiet moment at the butcher counter, you can ask them to sharpen some knives for you.If your local grocer has a prepared foods section, chances are they also do large format catered events, too.If you go to a big box store like Meijer or Walmart, you might find a car center tucked around the side. .