My first experience with drinking at a grocery-type establishment was at a place called Sam’s Wine Bar in Chicago. It was unique in my experience…a small four-seater bar in a back corner of the store that was open rarely and at obscure hours — often as part of a particular vendor demo. If you happened to be there at the right time, however, you could enjoy a couple good glasses of whatever was offered — we managed to be there for Dom Perignon — at a good price (sometimes free) and whoever was serving could tell you a lot about it. Sam’s was purchased and closed by what is probably…