clear line of sight to everyone except jacket man who is standing behind the rest of his gang, there is no cover, two lawn chairs near where the gangers are that have no tactical consideration as of now.
Lobby is 11m x 3m. Gangers are lined up and 2m away from the far wall.
Concrete knows exactly where the jacket man is and the lack of true cover doesn't obstruct anyone's vision or overall perception of the lobby, but with the vested man between them, a direct shot at him,by Concrete's judgement, will incur +3 to threshold for the hard shot that he's considering.
If this doesn't answer your questions, please don't feel frustrated. Just clarify anything else you need to know and I'll try to paint a clearer picture for you!