I can OC here in AZ as has been mentioned but prefer not to. I can also carry concealed without a permit. I did choose to get the permit though as there are some restrictons on those who carry with a permit. As far as going into places that serve alcohol, the term is serve. A 7-11 selling beer is not serving alcohol for consumption on the premises so unless you plan on drinking it in the store, which BTW is illegal no problem. One of my favorite eating places has a bar and you can have drinks with your meal. If I'm carrying, I cannot drink alcohol legally so I don't. No big deal.
My preference for keeping my firearm hidden is just common courtesy. Why upset those who are on the fence about firearms and let's not freak out those who are part of the Brady bunch. If a bad guy should show up, why warn him that I'm a threat to his well being. God forbid that I should have to shoot someone but that does not mean I won't if push comes to shove. The only places I do not carry are those who have posted signs. I patronize them as little as possible.
Paul B.