My first thought would be towards drawing on something from the Arthurian or Greek myths, in the spirit of the series itself, but that might create weird expectations. A play on Canterlot like Trotnot might work, but if we're still going to be using the standard names, it's kind of a waste to do that.
As I'm always a fan of alliteration, I'm just going to have to throw a few of these out there: Airhead Academy, Canterlot Changes, Sleaze School.
And, playing with an entirely different vein of entertainment: Seduction of Canterlot.