I've caught pieces of that movie on TV late at night. It does look pretty good from what I saw of it. The part that sticks out in my mind was a scene that showed how Sammy being the butt of some of the others' racist jokes was something he took in stride onstage but really hurt him.
I do very much enjoy the Rat Pack's music too, with Dean Martin being my favorite and Frank a close second.
If I can toot my own horn just for a second, I recently sang Return To Me at a party and was told it was the best Dean Martin imitation this guy had ever heard. Of course, he may have been really drunk...
Dino rules though. Lately the song of his I've been playing the most is the seasonal favorite "Baby, It's Cold Outside".