Continuity mistake: When Rebecca and Sam are talking about the auction in one shot the beer in front of Norm disappears. (00:03:25)
Continuity mistake: Sam puts a beer in front of Norm. The shot changes and Sam repeats the action.
Continuity mistake: When Carla hands the drinks to the costumer to bring to table six there are 3 drinks - 2 brown and 1 clear. The shot changes and now it's 1 brown and 2 clear. (00:07:10)
Continuity mistake: At the beginning of the episode after Rebecca goes into the office, Woody walks over behind the bar and starts to talk to Sam. Carla has her hand by her mouth - the shot changes and she doesn't. (00:02:50)
Answer: Here is the source of the "WE WIN" photo: http://www.oldnycphotos.com/nyny587ac.html Brooklyn, of all places.