Finally, constructive, realistic proposals to address the issue, at least in Hollywood. 

Starting with: "First of all, can we agree that no more meetings for anything related to work be held in hotel rooms? That would be up to the unions to firmly enforce."

 Yes! Spence was ridiculed for refusing intimate evening  tête-à-têtes with women not his wife, but there is a reason there used to be a general principle that men don't invite women to their hotel room, and women didn't accept if invited...unless both clearly had sex in mind. Otherwise it is an invitation for trouble, because then it becomes a "he said, she said" situation as there are no witnesses. The first step is clear rules saying that is not appropriate in a work situation, period.

The rest is also common sense.