Hollywood Outtakes: On Set or On Location--Railroad Stations

Here is a series of clips, outtakes from Hollywood studio productions, of busy interiors of big-city railroad stations. Which ones were filmed on-set? Which ones were filmed on location? Can you tell? If you think you know, leave a comment saying which you think is which.
Here are my guesses:
1. (0:19) Can't be sure, but the scene appears to have a lot of depth, even if it is rather small. On location?
2. (0:30) The clapboard says "stock," so this could not only be on-location, but the people in it might be actual travelers. The scene is certainly well-lit, though. Busy, too. Location.
3. (2:06) Definitely a set. The lockers on the back wall almost look painted on.
4. (2:38) Sure looks like track 26 at Grand Central Terminal in New York. But the second set of doors in the back aren't right, as well as the chains and railings. Set?
5. (3:04) Looks, at first, like the same track-26 set in number 4, except that the car listing next to the train board is gone. Again, the doors in the back suggest that it is a set.
6. (3:26) A third take on New York's Grand Central Terminal, only this time we see the train and platform. Pretty convincing, until the train starts to move. No New York Central passenger train would start that jerkily. Set.
7. (4:30) Looks like location to me. Wish I knew where it was.
8. (4:53) Looks like a set to me. The man in spats cuts in line.
9. (5:22) Tight shot. Looks like a set to me.
10. (5:36) Is this supposed to be Los Angeles Union Station? Set?
11. (6:01) Definitely a set--the forced perspective gives it away. The painted ceiling looks a little like Washington D. C.
The film is silent (though by watching the actors, you can practically hear the director yell "Action" and "Cut"), so I've added some music by Australian composer Arthur Benjamin to the soundtrack.

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