In Minnesota, where I'm from, grocery stores can't sell beer, wine, or liquor, you must go to a liquor store.
Then I moved to Seattle, where beer and wine are available in grocery stores, but liquor is relegated to state-run liquor stores that all look the same.
Now Costco is leading a charge to get liquor more readily available in regular stores here in Washington state. Dude, why not? It seems to work just fine in California.