But I wonder what Ismay, Andrews and Smith would have thought of it...
I've done a bit more research and reliable information was hard to come by. As you can imagine, Ismay was reluctant to talk about it and Andrews and Smith sadly lost their lives.
Ismay apparently was heard by two first class passengers discussing the film. He showed them a review from the newspaper that the Captain gave him before tucking it into his pocket.
There is a report that Mr Andrews told the Captain he walked out after an hour, maybe an hour and a half.
Finally, piecing together discussion of the film by QM Hitchins and the 4th Officer I found this from Smith:
The Captain rushed out of his chart room and spoke to the first officer.
"What the hell have I just watched Mr Murdoch?"
"A rubbish film sir? I tried to get a round of Port in but the bar was closed"
"I want to hear the sound of the Carpenters around the ship"
Clearly the Captain was distressed by what he saw that Murdoch thought a stiff nip of Port was advisable. The Captain, looking to relax wanted to hear the music of the Carpenters piped around the ship.
The accuracy of this account may be questionable but it is based on witness testimony.