It's actually fun to watch. I've seen this movie twice. The funniest parts are Bogey's demeanor throughout the movie. First of all he weighs about 140 pounds, but he supposedly goes around starting fist fights. He even says he's done it 100 times. Then he invites a coat check girl to his apartment at 10 or 11 at night so she can tell him about a book and she actually goes. Plus the girl breaks a date with her boyfriend so she can do this.
But when the girl is found dead and Bogey is named the suspect, he literally doesn't care. He's just lackadaisical in the interrogation room. Then he hooks up with his beautiful neighbor, has her move in, and orders her around like a tyrant.
I loved the scene where Bogart is at his typewriter and orders his girlfriend to make him, "Orange Juice, eggs over easy, bacon, toasted muffins, strawberry jam, and lots of coffee" Then she happily says, you'll have it in 10 minutes.
Hilarious scene.