Bars are tricky per gun laws; 41 states have laws where guns can be allowed into bars and restaurant bars. At the same time, a lot of people don't want to go into bars that allow guns and that is why they are not allowed. Think of some of the rough bars that there are around; people don't anyone to be able to walk in with a gun even with what happened in Orlando.
Biker bars, probably some Western bars on a Saturday night and so on; in this area, the laws are not as straight-forward.
Great points, and it demonstrates how deeply political correctness has penetrated and compromised our safety. Gun free zones represent magical thinking, and are no more of a protection than a clearly marked bike lane is to a bicyclist.
One instance can be made out as a singular event and talked away for any number of reasons. But God forbid, we have repeats of this atrocity, it will highlight all of the previous gun control talking points as the BS they really are. Ditto for the American myth of the "Religion of Peace".