Disaster movie with a showgirl

Hello,

This movie has been going through my mind for a long time.
I once saw a disaster movie where a showgirl was one of the initial survivors but later dies because of another survivor that acts like a j*ck*ss. And he also dies in the process. They die when something collapses. I know it’s an older movie but I don’t know how old. I think it’s situated in a casino or on a boat but I’m not sure. Can you please help.