That seems to me to be the major problem. Places like Classicos inspect everyone for guns and dont let you in with one. They have a big box at the bottom of the stairs to check your gun in. El Flow has nothing like that. The bar itself isnt the problem its the people coming to the bar that create the problem. Security needs to do a better job of policing the crowd and not letting people inside or even on the street in front with weapons or to cause problems. If they dont they will lose a lot of business eventually.
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