Retail giant Costco has certain items that can be easily accessed even by non-members. This list of items also includes alcohol (at least in certain states).
For instance, in Arizona, California, Delaware, Hawaii, Indiana, Kentucky, Massachusetts, Michigan, and Minnesota, it's illegal for a store to require a membership to buy alcohol.
You can peruse Costco's selection of beer, wine, and liquor without a membership in these states, but not every location has the full selection of beer, wine, and liquor.
Stores in Ohio, Texas, and Vermont only offer beer and wine. In Colorado, Connecticut, and Georgia, the availability of any type of alcohol varies from Costco to Costco.
Mississippians can buy wine and spirits but have to sign up to buy beer. New York's rules are the same, but wine and liquor are only available at the Oceanside Costco location.