Guys he isn't asking about drinking and carrying. He is asking about carrying in a place that 1) is likely to have physical confrontations between patrons or patrons and staff on a regular basis, and 2) is even more often packed shoulder to shoulder with people.

To help get you guys on the right track, here are two situations:

1) You are behind the bar when a fight breaks out. A space in the middle of the floor opens up where two dudes are fighting. You can see because you are standing on the bar, but otherwise, the two are completely surrounded by a wall of people at least 20 persons deep. One of them whips out a 5" knife and starts swinging at the other. Do you clear leather and engage the guy with the knife?

2) Same situation as #1, only you are the other guy in the circle in the middle of the bar.

Same situation with a concert. You see a guy knifing people in the mosh pit, do you draw and fire into a mosh pit?