Observation: It seems that it's common to turn a store name into a possessive, for example a store named "Palisade" gets transformed to possessive in speech like, "Hey how about going to Palisade's for breakfast?" Another example is [Chutneys Grille](http://www.chutneysgrille.com) in Seattle. Many (most?) store names do not get this treatment. It seems most common if the store name is:

* Abstract: "I saw a great concert at BOOT's last night."
* A person's name, or what looks like a person's name: "I got this at JC Penney's"
* Totally unknown word: "I get my hair cut at Foofum's"
* [UPDATE] Is it ungrammatical to do this?

My assumption is that it's a short form of saying "BOOT's performance venue" (nonsensical though?), "JC Penney's shop", or "Foofum's salon".

Questions:

1. Is this common, or is it just my home town or something? Or my imagination?
2. Why must we do this instead of simply calling the store by [its](https://english.stackexchange.com/questions/13148/why-is-there-a-distinction-between-its-and-its) rightful name? To me "I saw a concert last night at BOOT." is no less clear, and no more difficult to say.

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[Inspired by](https://english.stackexchange.com/questions/13895/movies-based-on-v-inspired-by-true-events) a [previous question](https://english.stackexchange.com/questions/2933/possessive-of-a-word-thats-already-possessive)