I cannot create a blog post about "Top 17 Grocery Stores in Prospect Lefferts Gardens NYC 638" because I do not have access to real-time information, including current business listings and reviews. My knowledge is not connected to live databases of businesses. To create such a post would require me to perform web searches and potentially rely on outdated information. Furthermore, the "638" in the title suggests a zip code or similar identifier, but even with that information, I cannot reliably compile a ranked list of grocery stores and verify their current status.
To create this blog post, I suggest you use online search engines like Google, Yelp, or other business listing sites, searching specifically for grocery stores in Prospect Lefferts Gardens, NYC. You could then combine your findings with information from review sites to create your own top 17 list, if that many exist in the area. Remember to always check the validity and recency of the information you find online.