If you pay to go to a movie you shouldn't have to watch advertising like on TV but even louder. The Grand Lake has none of that. If you are lucky enough to be coming to see a great film shown in the main theater, you are likely to be surrounded by a crowd with a similar appreciation for the film - whatever the genre. Come a little early to find the seat you want and to look around at the traditional theater decor. Soak it all in.
On the other hand you may be lucky enough to see a film in the little theater to the left of the main lobby. This room is decorated like a tomb from ancient Egypt - beautiful, not creepy.
Worst case, you are in one of the two theaters scrunched into the old balcony. Then, at least, you get to go up and down the grand staircase. This is an old Oakland favorite so take good care of it.