Unless someplace has a statutory restriction on CCW (ie state law says you can't carry ther) like schools (what a crock), police stations (what a crock), airports (what a crock), restaurants that serve liquor (what a crock), their sign doesn't mean much. First, the charge is only a misdemeanor if found carrying in any place that voluntarily displays a no CCW sign. Second, someone would have to spot your gun.
AFAIC, unless it's a place where I will be frisked or searched, it goes.
Our law sucks, but there are efforts to fix most of what is wrong with it. In particular, we need to fix the BS car restrictions and we need to force employers to allow firearms in employees' cars regardless of whether or not the parking lot is on company property.
Employers who forbid weapons in cars parked on their property are VOIDING THE WILL OF THE PEOPLE by essentially cancelling your CCW right from the time you leave home to the time you return. I don't care if they don't want them in their buildings, because they are not open to the public, but my car is not their property, even if it's parked on theirs.
Think about it.