"Charm school" refers to a place or program where people, usually young women, are taught manners, etiquette, social skills, and how to appear graceful and polite in various situations. Full definition
Maybe another semester in charm school is in order. (digitaltrends.com)
For years I have wanted to put those girls and that charm school into a novel. (bookbrowse.com)
The chef, who had probably been looking forward to an early night, didn't seem very happy about providing board and lodging, but two rooms, two steins, two plates of meat and veg (literally) and two bowls of apple strudel (awesome) were grudgingly produced and, frankly, we were too tired to care about degrees from charm school anyway. (evo.co.uk)