Loved all the scenes with the characters in the movie interacting with people in the real world, especially when they start arguing with patrons in the movie theater.
You've seen Guy Standeven in something because the man was in everything.

I liked the musical montage where Cecelia explains to Tom how a woman gives birth and that is how children are made.
and the scene where Tom comes right out of the screen for the first time. It was really shocking and I thought she'd be alone in the theatre.

I really enjoyed the scenes you mentioned. Two of my favorite scenes are:

1. Tom is in the brothel and he's explaining why he can't accept the women's "hospitality" because he's in love with Cecilia"Every breath she takes makes my heart dance"and the effect his declaration has on women who have an even bleaker existence than poor Cecilia's.
   2)Gil and Cecilia are in the music store and she's playing a ukelele while he sings (very well, too, imho) "I'm Alabamy Bound." I like it because not only is it a joyful and entertaining scene, but it's the closest Cecilia will ever come to being in a "just like the movies" situation with a real person. I mean, weren't old movies just chock full of scenes where people burst into song, and then declare their feelings? No matter how insincere Gil might prove to be later, she did have that moment of joy with him.
   OT, but if that was really Ms. Farrow strumming the ukelele, she'a a heck of a player!