Always Carry!
Personally I carry all day every day and everywhere I go, if there is a sign I don't go there and find somewhere else to spend my money.
Last night on CBS Real People an example was presented to carry at all times. A female officer in St. Louis was leaving her boyfriends house and stowed her vest and weapon in her car to say good-bye hands free. During the minute they were on the sidewalk they were approached rapidly by to armed black thugs demanding their valueables. They ended up being dragged inside the boy friends house at gun point, where his grandmother, mother, female cousin and her 2 male children were sleeping. Long story short the officer made move to end the situation without her weapon in an attempt to get to her weapon, she was shot 5 times and survived, boyfriend was shot 3 times and survived and the cousin was shot once and died of her wound leaving her children to be raised by her aunt.
The situation haunts the officer and she has left the force because of the incident. Her words had she not stowed her weapon it would have all gone down differently and it would have never gotten inside the house. (where the cousin was shot and killed)
Always carry everywhere you are allowed and I suggest even carrying at home when you can.