No, my .40 and my 9mm were both secured in the car. I don't carry into anyone's house, period, unless it's a Craigslist deal. Something just strikes me as not right about it. Courtesy, I guess.
As for businesses that post it up, I politely ask for the manager, and then give him or her my card that reads "NO Firearm, NO $" and politely leave. My weapon is in the car; I'm just makng my point. My car dealer posted it up and I politely told them that I'd find another dealer. Now, I'm permitted by the owner to carry in the dealership in writing.