Empty Classroom

Serenity strolled in, wearing cyan sweatpants and a matching tanktop, holding an advertisement for the new club she had formed a week ago. Catchy name, she thought, she had made it up herself.
The advertisement read..
SHAPE UP
Weight loss so fast it's almost magic!
Plus, tips on how to get guys.
President Serenity Rosensteel, using this program, lost twenty-five pounds..
Drop two sizes by Christmas break, or your money back!
Entry fee is only five galleons!

Tacking it to the wall, she turned to her class, grinning.

I'm gonna make tons of caaaash...
[It's gonna be closed down by Umbridge.]

Rachel walked by the Empty Classroom, and gazed at the notice for a minute. Rachel than sighed a little. "She would do that... and she's skinny enough." she mumbled.

Serenity stuck her head out the door.
"HEY! Rachel, wanna join my club? PLEASE?"

"Serenity, I'm skinny enough, and you're skinny enough! I mean, look at you!" she said waving a hand at her body.

"I'm not doing this for me. It's for the overweight girls out there.. That have cash. And hopeless crushes."

"Yeah... sure... so, where are you going to find girls with all three of those, huh?"

"I just need two of the three." Serenity grinned. "So, wanna be my assistant?"

"Errr, I dunno Serenity. I think they're plenty of slim kids at Hogwarts. I mean, the food here is pretty healthy, right?" said Rachel, studying the notice again.

With a loud crash, the door opened again revealing Amanda's head. "How many dang empty classroom's are there?"

"Well, we ARE in a CASTLE after all," said Rachel, in a way that you would tell a five year old that. "Anyway, Serenity's trying to start a crazy new club or something,"

"True, true." Amanda then stoppped to let the club part sink in. "For what?" Her eyebrows were raised a little. o-o

"Losing weight, of course? Wanna join?"
[THAT AVATAR IS SO LIKE ME.]

Amanda's eyebrows were then raised even more. "I'm.. no... thanks." Amanda blinked. A thought ocurred to Amanda little while after Serenity asked her if she wanted to join. "Do I look like I need to?!"

"No, you don't." said Rachel quickly, waving her hands at her. "You're a perfectly nice weight."

Amanda sighed of relief, not because she really cared about how she looked, but she didn't want to be unhealthy. As she sighed she quickly wiped the back of her hand on her forehead, letting out a slight "Feww."

"But, I dunno. Do you think I'm fat Amanda!?" said Rachel quickly with a look of fright on her face.

"No no no no no no no no no!" Amanda said quickly, letting only the first no be understandable.

"Are you sure!?"

"As sure as I am about Snape having greasy hair!"

"Alright, thanks," said Rachel looking quite relieved. "But, I still think we should start a club besides something like a weight loss club."

Amanda nodded, "Not that it's a bad idea or anything, just... yea."

"The club isn't for US, sillies. It's for me. To make cash. Besides, clubs are too regulatory- nobody wants to have to see their friends every single meeting. It's too forced."