Buddy in the Business
My buddy is in the business. He tells me stories about his days in training. A majority of the training revolves around making yourself inconspicuous. How to work a crowd or the traffic without arousing suspicion. And I mean really working the crowd, as in casing the joint, checking for unfriendlies, listening in on conversations, and looking out for people who have probably received very similar training without getting too many false-positives.