After avoiding the topic for a few weeks, I asked Susan if she was going to pursue holding an adult pointe class at Joy of Motion this spring. She says that JoM doesn't really want to hold an adult pointe class.
She asked whether I'd had any luck at Md School of Dance. I told her that Kim Parmer didn't want to teach any additional classes, and that Mané wasn't interested in teaching an adult pointe class. I said that they might be willing to host the class if she wanted to teach it, but she didn't jump at the opportunity.
I asked Susan what adult students who wanted to learn pointe ab initio should do. She suggested that anyone in that situation should pick out a beginner-level class and ask the instructor if it'd be okay to take class, or at least barre, wearing pointe shoes. Of course, that's pretty much what people are doing now.
If there is a bright side to this, it's that there is heightened awareness of the interest. You'll still need permission, which you would have needed to do anyway—and let's face it, some people are not physically prepared for pointe work—but you're unlikely to get the death glare for asking. There are at least three or four students in Susan's Beginner II classes at MYB who take barre in pointe shoes, and one or two often do the entire class. There are two in pointe shoes in Mané's Thursday night class at MSD, one who just started. So you wouldn't be the only one. However, both instructors suggest talking to them before investing in pointe shoes.