For Virginia this is a summation of the law from Packing.org:
Places off-limits while carrying
Date updated: Oct 23, 2005 @ 10:09 am
No person shall carry a concealed handgun onto the premises of any restaurant or club as defined in §4.1-100 for which a license to sell and serve alcoholic beverages for on-premises consumption has been granted by the Virginia Alcoholic Beverage Control Board under Title 4.1 of the Code of Virginia, nothing herein shall prohibit any owner or event sponsor or his employees from carrying a concealed handgun while on duty at such restaurant or club if such person has a concealed handgun permit. NOTE: only concealed handguns are prohibited - openly carried handguns are allowed.
Private property when prohibited by the owner of the property, or where posted as prohibited. Violation is a trespass charge and not a firearms violation.
Carrying dangerous weapon to place of religious worship while a meeting for religious purposes is being held unless you have "good and sufficient reason." There is no known definition of what a good and sufficient reason would be. Violation is a minor crime, punishible by a fine of up to $100.
Courthouse. Violation is a high-level misdemeanor.
School property/school functions unless gun is unloaded, in an enclosed container (but NOT in the glove box or console) and in the vehicle. A car's trunk is considered an enclosed container. However, a concealed handgun permit holder can have a loaded, concealed handgun in the vehicle while in the school parking lot, traffic circle, etc. The concealed handgun and the permit holder must stay in the vehicle. Firearms are not banned from property open to the public where a school function is being held unless that property is being used exclusively for the school function. Violation of this statute is a felony.
Virginia Commonwealth University (8VAC90-10-50). Violation is a trespass charge
Non-secure areas of airport terminals are off limits unless you are a passenger and you have your gun unloaded, in a locked container in your checked luggage, and declare the gun at the check-in counter. Violation is a high-level misdemeanor.
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When carrying I'm always carrying concealed where legal. So when I enter a place that posts I continue to carry. If for any reason I am asked to leave I will. This has yet to happen.