Not that this movie lends itself to them, but do you think anything stands out, aside from the more famous lines?
Any scene with Rick drinking or smoking,that was 90% of the movie.
"You despise me, don't you?"
One that came to mind was the "I'm shocked that gambling is going on here / Your winnings, sir" sequence, but then that's supposed to be funny.
Another that came to mind was Greenstreet and Bogart's "flirting" look exchange.
Or the scene where Lorre is talking to Bogart, starting with Lorre's "When you first came to Casablanca..." through his expressions just after Bogart walks away from him.
Gadfly
After Rick helps the young couple win the money for their exit visas....the Gertrude Stein look-a-like pulling Rick's drink away while giving him a "look" and then putting it back after getting the evil eye from Rick....
knock on wood!