I don't go to bars anymore, but I would try to emulate Robert Kolesar no matter where I may happen to be...

"I figure I'm the person ultimately responsible for my family's safety; that's why I still carry a gun. I'm not working the streets anymore, I'm not really concerned about what people do to each other. I won't get involved in something that's none of my business. This may sound unduly harsh or selfish, but 24 years as a cop has taught me most incidents I've observed may not be what they appear to be initially- and shouldn't rise to the level of my armed intervention. Staying out of conflict is as important as knowing how to confront someone. I'm happily prepared to call 911 or just be a good witness."