Visible crew/equipment: When Carla says "You're kidding" about the picture she has, a boom mic is visible. (00:12:20)
Visible crew/equipment: When Norm walks in at the beginning of the episode you can see the end of the set the brick wall changes to a curtain.
Visible crew/equipment: When Cliff's father comes into the bar for the first time and is standing by the bar, the end of the set the brick wall changes to a curtain. (00:07:45)
Visible crew/equipment: At the end of the episode when Cliff is talking you can see the end of the set, the brick wall changes to a curtain. (00:23:55)
Visible crew/equipment: In the opening scene after Sam says "I think this calls for drastic measures" there is a shadow of the camera on the wall behind Norm.
Answer: Here is the source of the "WE WIN" photo: http://www.oldnycphotos.com/nyny587ac.html Brooklyn, of all places.