Preparation is the key to questions such as above. I regret (mostly) the lost opportunity to discuss the merits of open carry with people who inquire. Sometimes if one is busy concentrating on matters at hand we simply are not able to switch modes instantly to give serious consideration to their questions. It is something I'm sure we could all get better at.
I had a discussion yesterday with an older gentleman about the same, OC vs. CC. It started with him telling me that he has an old Ithaca 16g pump he wants to sell in order to buy a carry gun. (If anyone is interested in this old beauty let me know and I can put you in touch with him.) He went on to ask about various snubbies and what I thought and then asking about getting his CC permit. I asked him why he didn't just open carry. He said that he had been told what a bad idea that is and that he would be hassled at the very least. He asked me about being hassled by the police and I assured him that here in Henderson he would have no trouble. That unless there was some other issue involved not in Vegas either. I warned him about the NLV issue and that was being worked on, but as a general rule it is not an problem either.
I told him that some businesses might ask him to leave but actually that happens very rarely to almost never depending on where you go. He asked me what I would do in that event and I responded "What business doesn’t have competition? If they won't honor your rights why would you want to spend your hard earned money with them?" I'm going to take he and his wife with my family to the range and let him tag along with me one day just to see that it really is not an issue. We'll see how it goes.