FIGHT CLUB RULES:

A/N: I don't own grey's anatomy, or their characters, or fight club. Rated for language and maybe some adult content later on. Post Desire story. McStizzie Friendship and eventually McStizzie as they were meant to be.

Chapter 1

The following morning after Addison had left and George told Izzie that he is transferring to Mercy West. The interns were in the locker room and had just finished changing when Bailey came in with the attendings.

"Okay, you're intern exam is coming up in a few weeks and along with you're intern responsibilities, you need to study for this exam as much as possible, which means attendings (now addressing Burke, Shephard, Sloan and Torres) that you will need to help out with the scut and no dumping extra work on your interns (looking pointedly at Sloan). Okay, O'Malley-Shepherd, Yang-Torres, Grey-Burke, Stevens-Sloan, and Karev you'll be covering Jane Doe along with helping me in the clinic. Now move it people."

They all followed their respective attendings out of the locker room, Sloan was walking quickly with Izzie trying to catch up, already in a pissed off mood, muttered to himself. "Great, I get stuck with the peppy Barbie cheerleader today. Can my day suck more?" Seeing that Izzie was still behind him, "Stevens, you think that you could stop your leisurely walk and try to hurry the hell up?"

Izzie stopped in front of him and put her hands on her hips. "First of all I'm not feeling so peppy lately. Secondly, I am neither a Barbie nor am I or have I ever been a cheerleader. Thirdly, if it makes you feel better, you're not really the sunshine in my day either; and don't even think about asking me to do your slave work today. So how about we get through this day with as little non-medical conversation as possible."

Sloan sidestepped her and started walking while he spoke. "Sounds freaking fantastic. And Stevens, I mean it, any sunshine and happiness from you today and you'll be doing so much scut you won't see the inside of the OR for a month."

Izzie finally catching up to his stride replied sarcastically, "Great, who's the first patient?"

They walked into the patient's room where Sloan started speaking.

"Dr. Stevens, this is Rosa Suarez age 31. She is in today for breast reconstruction following a double mastectomy. Ms. Suarez, this is Dr. Stevens she will be the intern on your surgery today. Do you have any questions about the surgery?"

"No, Dr. Sloan, you explained it all last night."

"Okay, if you have any questions, feel free to ask Dr. Stevens or have the nurses page me. (to Izzie) Stevens, go prep her for surgery."

"Yes, Dr. Sloan," Izzie replied to his retreating back as he had left the room already. Izzie proceeded to take her vitals.

"Oh, he's so cute, is he single?"

"If you use the term loosely."

"Oh, Dr. Sloan is one of those, the guys who sleep around. Like my husband Robert."

Sloan was coming back in to the room but stopped when he heard his name. He stopped outside the door but could only see Izzie but he could hear the entire conversation.

"Oh, I'm sorry," Izzie replied uncomfortably, trying not to get involved.

"We were married for 7 years and then he had lost his father and found out about my cancer in the same week. He became distant and wouldn't talk to me. Then one day, the last day, the last day of my chemo, he tells me that he has fallen in love with his ex-girlfriend, that they have been sleeping together and that they are expecting a child!" With that Rosa starts crying.

Izzie hands her a tissue and says, "I'm very sorry."

"What kind of person gets involved in adultery? How can someone ruin another person's marriage?"

Sloan saw Izzie's face change, only for a fraction of a second, but he saw it, it was a look that he knew well, a look of guilt.

"I don't know. Umm, I have to go check on something but I'll be right back to finish prepping you." With that Izzie hurried out of the room not even noticing Sloan and she went into the women's bathroom on the other side of the hall. Out of curiosity more than anything, Sloan followed her making sure that no on was looking, he sneaked inside the bathroom. He checked the stalls and all of them were empty but one so he locked the bathroom door and went back to the one stall that was occupied by Izzie.

He knocked on the stall door and said, " Stevens, suck it up and come out here."

"You realize that this is a woman's bathroom, right? And unless you've been doing sexual reassignment surgery on yourself, you don't have the women parts that qualify you to use this bathroom."

Sloan smiled to himself about the intern's ability to come back with retorts even when she was crying and responded to her, " Stevens, come out now before I take you off this case."

Izzie opened the stall's lock and Sloan thought "Interns, taking away their chance of surgery is like taking away life." Izzie emerged her eyes water and face blotchy and pink.

"So, Stevens, who'd you do the dirty deed with?"

"Excuse me?"

"Who did you have sex with? Which married man?"

"Why would you think that?"

"Don't even bother lying to me. I saw your face when she asked what kind of person could commit adultery and you looked guilty."

Izzie hardened her face and responded, "whatever I did or didn't do is none of your business."

"It becomes my business when your personal crap interferes with my surgeries."

Izzie with a very annoyed look on her face said, "Don't worry. My personal life won't ever affect you or your surgeries. Now if you'll excuse me, I have a patient to finish prepping, unless of course, you want another intern?"

Sloan looked at her intently and replied, "Fine, go but keep it professional Stevens."

"Believe me, when it comes to you Dr. Sloan, it will never be anything more."

She left the bathroom leaving Mark more curious about what the intern was hiding, anything to keep his mind off of Addison.