It isn't necessary to the plot or to character development. It's a comedy bit, and it does grind the show to a halt for way too long. We already know that Rose is upset and drinking at the bar outside the Shriners meeting. This just extends the moment by emphasizing her frustration.
But to say it's gang-rapey is a copout. That would depend on how it's staged. If she goes into that room and flirts with the Shriners and works them into a fever, then, yeah, that's pretty gang-rapey (or more like gang-bangy). But if it's rethought a bit, with her in total control of the situation (just the way the staging was rethought for "A Secretary is Not a Toy" in the '90s How to Succeed revival), then it could work. She's the one with the power, and she's rendering the "boys" powerless. She could just crash their convention to stir up trouble and freak them out. Not "come on" to them and slither over their bodies. With a clever choreographer (where the hell are they, these days?), I could see this being a real standout.
Of course, that approach would require the creative team and talent to have some imagination.
What am I thinking?!?!
Okay, so it won't kill the show if it's missing (by any means). They're just losing an opportunity to creatively rise to the challenge, instead of caving under it.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22